TeamViewer responds to security 'irregularity' in IT network • The Register

<!doctype html> <html lang="en"> <head> <meta content="text/html; charset=utf-8" http-equiv="Content-Type"> <title>TeamViewer responds to security 'irregularity' in IT network • The Register</title> <meta name="robots" content="max-snippet:-1, max-image-preview:standard, max-video-preview:0"> <meta name="viewport" content="initial-scale=1.0, width=device-width"/> <meta property="og:image" content="https://regmedia.co.uk/2024/06/27/teamviewer.jpg"/> <meta property="og:type" content="article" /> <meta property="og:url" content="https://www.theregister.com/2024/06/28/teamviewer_network_breach/" /> <meta property="og:title" content="TeamViewer responds to security 'irregularity' in IT network" /> <meta property="og:description" content="Claims customer data, prod environment not affected as NCC sounds alarm" /> <meta name="twitter:card" content="summary_large_image"> <meta name="twitter:site" content="@TheRegister"> <script type="application/ld+json"> { "@context":"http://schema.org", "@type":"NewsArticle", "mainEntityOfPage":{"@type":"WebPage","@id":"https://www.theregister.com/2024/06/28/teamviewer_network_breach/"}, "headline":"TeamViewer can't bring itself to say someone broke into its network \u2013 but it happened", "datePublished":"2024-06-28T00:37:41Z", "dateModified":"2024-06-28T19:05:34Z", "image":{"@type":"ImageObject","url":"https://regmedia.co.uk/2024/06/27/teamviewer.jpg","width":"1000","height":"667"}, "author":{"@type":"Person","name":"Jessica Lyons"}, "publisher":{"@type":"Organization","name":"The Register","url":"https://www.theregister.com/","logo":{"@type":"ImageObject","url":"https://www.theregister.com/design_picker/1fea2ae01c5036112a295123c3cc9c56eb28836a/graphics/std/red_logo_sans_strapline.png","width":330,"height":55}} } </script> <script> var RegZoot = { }; var RegCC = [ ]; var RegPageType = 'Story'; var RegTruePageType = 'www story'; </script> <link rel="canonical" href="https://www.theregister.com/2024/06/28/teamviewer_network_breach/"> <link rel="amphtml" href="https://www.theregister.com/AMP/2024/06/28/teamviewer_network_breach/"> <script src="/Design/javascript/html5shiv.min.js"></script> <script> // IE8 only polyfilly for eventListener // source: https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener#Compatibility !function(){if(Event.prototype.preventDefault||(Event.prototype.preventDefault=function(){this.returnValue=!1}),Event.prototype.stopPropagation||(Event.prototype.stopPropagation=function(){this.cancelBubble=!0}),!Element.prototype.addEventListener){var e=[],t=function(t,n){var o=this,r=function(e){e.target=e.srcElement,e.currentTarget=o,void 0!==n.handleEvent?n.handleEvent(e):n.call(o,e)};if("DOMContentLoaded"==t){var a=function(e){"complete"==document.readyState&&r(e)};if(document.attachEvent("onreadystatechange",a),e.push({object:this,type:t,listener:n,wrapper:a}),"complete"==document.readyState){var p=new Event;p.srcElement=window,a(p)}}else this.attachEvent("on"+t,r),e.push({object:this,type:t,listener:n,wrapper:r})},n=function(t,n){for(var o=0;o<e.length;){var r=e[o];if(r.object==this&&r.type==t&&r.listener==n){"DOMContentLoaded"==t?this.detachEvent("onreadystatechange",r.wrapper):this.detachEvent("on"+t,r.wrapper),e.splice(o,1);break}++o}};Element.prototype.addEventListener=t,Element.prototype.removeEventListener=n,HTMLDocument&&(HTMLDocument.prototype.addEventListener=t,HTMLDocument.prototype.removeEventListener=n),Window&&(Window.prototype.addEventListener=t,Window.prototype.removeEventListener=n)}}(); document.attachEvent("onreadystatechange", function() { if (document.readyState === "complete") { // list of icons we want <= IE8 to replace with their png equivalents var svg_icons_png_equiv = [ // masthead icons (twitter + facebook are also shared for footer): 'reg_logo.svg', 'twitter.svg', 'facebook.svg', 'linkedin.svg', // navigation bar icons: 'vulture.svg', 'vulture_white.svg', 'search.svg', 'search_white.svg', // footer icons: 'sitpub_footer.svg', 'linkedin_white.svg', 'rss.svg', // lectures section icons: 'reglecture_logo.svg', // story template icons: 'reddit.svg', 'linkedin_alt.svg', 'linkedin.svg', 'calendar.svg', 'location.svg', 'rect_comment_bubble_white.svg', 'rect_comment_bubble_black.svg', 'envelope.svg', 'polls_unit_arrow.svg' ]; for (i = 0; i <= svg_icons_png_equiv.length - 1; i++) { var svg_icon = svg_icons_png_equiv[i]; var img_svg_icons = $('img[src$="' + svg_icon + '"]'); img_svg_icons.each(function() { $(this).attr('src', $(this).attr('src').replace('.svg','.png')); }); } var ad_params = { src: 'https://regmedia.co.uk/2018/06/15/gg2b_book.png', href: 'https://forms.theregister.com/gg2b/?td=iaomwtkie78' }; bird_alternative('ad_wp_top', ad_params); } }); </script> <script> var RegArticle={id:234881,pf:0,af:0,bms:0,sec:'security/cyber_crime',cat:'update_me',ec:[],kw:[["cybercrime",'Cybercrime'],["security",'Security'],["teamviewer",'TeamViewer']],kwp:[],short_url:'https://reg.cx/4dq0',cp:0,noads:[],author:'Jessica Lyons'} </script> <link rel=stylesheet type="text/css" href="/css/e5c206ed408f082870465a2c478e657ff0db3937/scaffolding.css"> <link rel=stylesheet type="text/css" href="/css/e5c206ed408f082870465a2c478e657ff0db3937/design.css"> <style> #nav-security, #nav-security-cyber_crime { text-decoration: underline !important; } </style> <link rel='stylesheet' type='text/css' href='/css/e5c206ed408f082870465a2c478e657ff0db3937/story_only.css'> <link rel=stylesheet type="text/css" href="/css/e5c206ed408f082870465a2c478e657ff0db3937/rows_basic.css"> <link rel=alternate type="application/atom+xml" href="/headlines.atom" title="The Register: whole site"> <link rel=alternate type="application/atom+xml" href="/security/cyber_crime/headlines.atom" title="The Register: Cyber-crime section"> <script> var RegCR = false; </script> <script src="/design_picker/14513432720673f1c1ee02761ba265b674b7bee1/javascript/_.js"></script> <script> RegGPT('reg_security/cybercrime','0df13fad2ea597c71ae99fa84c3f976d','0df13fad2ea597c71ae99fa84c3f976d'); </script> <script async src="https://www.googletagmanager.com/gtag/js"></script> <link rel=search href="https://search.theregister.com/"> <link rel=search type="application/opensearchdescription+xml" title="El Reg Search" href="/Design/page/search.osd"> <link rel="icon" href="/design_picker/13249a2e80709c7ff2e57dd3d49801cd534f2094/graphics/favicons/favicon.ico" sizes="any"> <link rel="icon" href="/design_picker/13249a2e80709c7ff2e57dd3d49801cd534f2094/graphics/favicons/favicon.svg" type="image/svg+xml"> <link rel="apple-touch-icon" href="/design_picker/13249a2e80709c7ff2e57dd3d49801cd534f2094/graphics/favicons/apple-touch-icon.png"> <link rel="manifest" href="/design_picker/13249a2e80709c7ff2e57dd3d49801cd534f2094/graphics/favicons/site.webmanifest"> <meta name="msapplication-TileColor" content="#ff0000"> <meta name="msapplication-config" content="/design_picker/13249a2e80709c7ff2e57dd3d49801cd534f2094/graphics/favicons/browserconfig.xml"> <meta name="theme-color" content="#ff0000"> <script src="/Design/javascript/respond.min.js"></script> </head> <body class="fullwidth" data-pagetype='Story' data-iebrowser='7' data-pagenum="0"> <div id="page"> <div data-oop="1" data-pos="top" data-raptor="kite" aria-hidden="true" class="adun"></div> <div id="masthead"> <div class="los_amigos"> <div class="left_nav"> <a id="mob_user_link" href="https://account.theregister.com/register/" aria-label="Your Account"> <img class="account_icon" width="16" height="16" src="/design_picker/ae01b183a707a7db8cd5f2c947715ed56d335138/graphics/std/user_icon_white_extents_16x16.png" srcset="/design_picker/ae01b183a707a7db8cd5f2c947715ed56d335138/graphics/std/user_icon_white_extents.svg" alt=""> <img class="filled_icon" width="16" height="16" src="/design_picker/ae01b183a707a7db8cd5f2c947715ed56d335138/graphics/std/user_icon_white_filled_extents_16x16.png" srcset="/design_picker/ae01b183a707a7db8cd5f2c947715ed56d335138/graphics/std/user_icon_filled_white_extents.svg" alt=""> <span id="mob_user_text"><span>Sign in / up</span></span> </a> </div> <div class="center_nav"> <a href="https://www.theregister.com/" id="logo"> <img src="/design_picker/fa16d26efb42e6ba1052f1d387470f643c5aa18d/graphics/std/reg_logo_no_strapline.png" srcset="/design_picker/fa16d26efb42e6ba1052f1d387470f643c5aa18d/graphics/std/reg_logo_no_strapline.svg" width="190" height="35" alt="The Register® — Biting the hand that feeds IT"> </a> </div> <div class="right_nav"> <a href="https://search.theregister.com/" class="nav_search topnav_elem" data-name="Search" aria-label="Search"> <img width="16" height="16" src="/design_picker/ae01b183a707a7db8cd5f2c947715ed56d335138/graphics/std/magnifying_glass_white_extents_16x16.png" srcset="/design_picker/ae01b183a707a7db8cd5f2c947715ed56d335138/graphics/std/magnifying_glass_white_extents.svg" alt=""> </a> <div id="site_nav_mobile"> <noscript><div id="site_nav_mobile_hiding_stamp"></div></noscript> <button id="mobile_menu_toggle" aria-label="Open menu" type="button"> <img width="16" height="16" src="/design_picker/ae01b183a707a7db8cd5f2c947715ed56d335138/graphics/icon/burger_menu_white_16x16.png" srcset="/design_picker/ae01b183a707a7db8cd5f2c947715ed56d335138/graphics/icon/burger_menu_white_extents.svg" alt=""> <img width="16" height="16" src="/design_picker/ae01b183a707a7db8cd5f2c947715ed56d335138/graphics/icon/burger_menu_white_close_16x16.png" srcset="/design_picker/ae01b183a707a7db8cd5f2c947715ed56d335138/graphics/icon/burger_menu_white_close_extents.svg" alt=""> </button> </div> </div> </div> <div id="top_panel_wrapper"> <div id="top_panel"> <div class="block_section nav"> <div class="nav_col first_col"> <div class="nav_top_group"> <div class="nav_topics"> <div class="nav_head_bk"> <h2 class="main_head">Topics</h2> </div> <div> <nav> <div class="nav_elem"> <div class="cat_header"> <div id="nav-security"> <a href="#subnav-box-nav-security" data-toggle-for="subnav-box-nav-security" class="topnav_elem mob_only">Security</a> <h2 class="desk_only section_nav-security"> <a href="#subnav-box-nav-security" data-toggle-for="subnav-box-nav-security" class="topnav_elem desk_only">Security</a> </h2> </div> </div><div id="subnav-box-nav-security" class="subnav_box"><a href="https://www.theregister.com/security/" class="subnav_elem" id="nav-security-all"><span class="prefix_all">All </span>Security</a><a href="https://www.theregister.com/security/cyber_crime/" class="subnav_elem" id="nav-security-cyber_crime">Cyber-crime</a><a href="https://www.theregister.com/security/patches/" class="subnav_elem" id="nav-security-patches">Patches</a><a href="https://www.theregister.com/security/research/" class="subnav_elem" id="nav-security-research">Research</a><a href="https://www.theregister.com/security/cso/" class="subnav_elem" id="nav-security-cso">CSO</a> <noscript><a href="#masthead" class="subnav_elem close_box" aria-label="Top navigation">(X)</a></noscript> </div> </div><div class="nav_elem"> <div class="cat_header"> <div id="nav-off_prem"> <a href="#subnav-box-nav-off_prem" data-toggle-for="subnav-box-nav-off_prem" class="topnav_elem mob_only">Off-Prem</a> <h2 class="desk_only section_nav-off_prem"> <a href="#subnav-box-nav-off_prem" data-toggle-for="subnav-box-nav-off_prem" class="topnav_elem desk_only">Off-Prem</a> </h2> </div> </div><div id="subnav-box-nav-off_prem" class="subnav_box"><a href="https://www.theregister.com/off_prem/" class="subnav_elem" id="nav-off_prem-all"><span class="prefix_all">All </span>Off-Prem</a><a href="https://www.theregister.com/off_prem/edge_iot/" class="subnav_elem" id="nav-off_prem-edge_iot">Edge + IoT</a><a href="https://www.theregister.com/off_prem/channel/" class="subnav_elem" id="nav-off_prem-channel">Channel</a><a href="https://www.theregister.com/off_prem/paas_iaas/" class="subnav_elem" id="nav-off_prem-paas_iaas">PaaS + IaaS</a><a href="https://www.theregister.com/off_prem/saas/" class="subnav_elem" id="nav-off_prem-saas">SaaS</a> <noscript><a href="#masthead" class="subnav_elem close_box" aria-label="Top navigation">(X)</a></noscript> </div> </div><div class="nav_elem"> <div class="cat_header"> <div id="nav-on_prem"> <a href="#subnav-box-nav-on_prem" data-toggle-for="subnav-box-nav-on_prem" class="topnav_elem mob_only">On-Prem</a> <h2 class="desk_only section_nav-on_prem"> <a href="#subnav-box-nav-on_prem" data-toggle-for="subnav-box-nav-on_prem" class="topnav_elem desk_only">On-Prem</a> </h2> </div> </div><div id="subnav-box-nav-on_prem" class="subnav_box"><a href="https://www.theregister.com/on_prem/" class="subnav_elem" id="nav-on_prem-all"><span class="prefix_all">All </span>On-Prem</a><a href="https://www.theregister.com/on_prem/systems/" class="subnav_elem" id="nav-on_prem-systems">Systems</a><a href="https://www.theregister.com/on_prem/storage/" class="subnav_elem" id="nav-on_prem-storage">Storage</a><a href="https://www.theregister.com/on_prem/networks/" class="subnav_elem" id="nav-on_prem-networks">Networks</a><a href="https://www.theregister.com/on_prem/hpc/" class="subnav_elem" id="nav-on_prem-hpc">HPC</a><a href="https://www.theregister.com/on_prem/personal_tech/" class="subnav_elem" id="nav-on_prem-personal_tech">Personal Tech</a><a href="https://www.theregister.com/on_prem/cxo/" class="subnav_elem" id="nav-on_prem-cxo">CxO</a><a href="https://www.theregister.com/on_prem/public_sector/" class="subnav_elem" id="nav-on_prem-public_sector">Public Sector</a> <noscript><a href="#masthead" class="subnav_elem close_box" aria-label="Top navigation">(X)</a></noscript> </div> </div><div class="nav_elem"> <div class="cat_header"> <div id="nav-software"> <a href="#subnav-box-nav-software" data-toggle-for="subnav-box-nav-software" class="topnav_elem mob_only">Software</a> <h2 class="desk_only section_nav-software"> <a href="#subnav-box-nav-software" data-toggle-for="subnav-box-nav-software" class="topnav_elem desk_only">Software</a> </h2> </div> </div><div id="subnav-box-nav-software" class="subnav_box"><a href="https://www.theregister.com/software/" class="subnav_elem" id="nav-software-all"><span class="prefix_all">All </span>Software</a><a href="https://www.theregister.com/software/ai_ml/" class="subnav_elem" id="nav-software-ai_ml">AI + ML</a><a href="https://www.theregister.com/software/applications/" class="subnav_elem" id="nav-software-applications">Applications</a><a href="https://www.theregister.com/software/databases/" class="subnav_elem" id="nav-software-databases">Databases</a><a href="https://www.theregister.com/software/devops/" class="subnav_elem" id="nav-software-devops">DevOps</a><a href="https://www.theregister.com/software/oses/" class="subnav_elem" id="nav-software-oses">OSes</a><a href="https://www.theregister.com/software/virtualization/" class="subnav_elem" id="nav-software-virtualization">Virtualization</a> <noscript><a href="#masthead" class="subnav_elem close_box" aria-label="Top navigation">(X)</a></noscript> </div> </div><div class="nav_elem"> <div class="cat_header"> <div id="nav-offbeat"> <a href="#subnav-box-nav-offbeat" data-toggle-for="subnav-box-nav-offbeat" class="topnav_elem mob_only">Offbeat</a> <h2 class="desk_only section_nav-offbeat"> <a href="#subnav-box-nav-offbeat" data-toggle-for="subnav-box-nav-offbeat" class="topnav_elem desk_only">Offbeat</a> </h2> </div> </div><div id="subnav-box-nav-offbeat" class="subnav_box"><a href="https://www.theregister.com/offbeat/" class="subnav_elem" id="nav-offbeat-all"><span class="prefix_all">All </span>Offbeat</a><a href="https://www.theregister.com/Debates/" class="subnav_elem" id="nav-offbeat-debates">Debates</a><a href="https://www.theregister.com/offbeat/columnists/" class="subnav_elem" id="nav-offbeat-columnists">Columnists</a><a href="https://www.theregister.com/offbeat/science/" class="subnav_elem" id="nav-offbeat-science">Science</a><a href="https://www.theregister.com/offbeat/geeks_guide/" class="subnav_elem" id="nav-offbeat-geeks_guide">Geek's Guide</a><a href="https://www.theregister.com/offbeat/bofh/" class="subnav_elem" id="nav-offbeat-bofh">BOFH</a><a href="https://www.theregister.com/offbeat/legal/" class="subnav_elem" id="nav-offbeat-legal">Legal</a><a href="https://www.theregister.com/offbeat/bootnotes/" class="subnav_elem" id="nav-offbeat-bootnotes">Bootnotes</a><a href="https://www.theregister.com/offbeat/site_news/" class="subnav_elem" id="nav-offbeat-site_news">Site News</a><a href="https://www.theregister.com/offbeat/about_us/" class="subnav_elem" id="nav-offbeat-about_us">About Us</a> <noscript><a href="#masthead" class="subnav_elem close_box" aria-label="Top navigation">(X)</a></noscript> </div> </div> </nav> </div> </div> </div> <div class="nav_bottom_group"> <div class="nav_bottom_section nav_special_features"> <div class="nav_head_bk"> <a href="#subnav-box-nav-special_features" data-toggle-for="subnav-box-nav-special_features" id="nav-special_features" class="topnav_elem mob_only">Special Features</a> <h2 class="main_head"> <span class="topnav_elem desk_only">Special Features</span> </h2> </div> <nav> <div class="nav_elem"> <div id="subnav-box-nav-special_features" class="subnav_box"> <a href="https://www.theregister.com/special_features">All Special Features</a> <a href="https://www.theregister.com/special_features/cybersecurity_month">Cybersecurity Month</a> <a href="https://www.theregister.com/special_features/vmware_explore">VMware Explore</a> <a href="https://www.theregister.com/special_features/blackhat_and_defcon">Blackhat and DEF CON</a> <a href="https://www.theregister.com/special_features/cloud_infrastructure_month">Cloud Infrastructure Month</a> <a href="https://www.theregister.com/special_features/malware_month">Malware Month</a> <a href="https://www.theregister.com/special_features/the_reg_in_space">The Reg in Space</a> <a href="https://www.theregister.com/special_features/spotlight_on_rsa">Spotlight on RSA</a> </div> </div> </nav> </div> <div class="nav_bottom_section nav_elem nav_vendor_voice"> <div class="nav_head_bk"> <h2 class="main_head"> <span class="topnav_elem desk_only">Vendor Voice</span> </h2> </div> <nav> <div class="nav_elem"> <div class="cat_header"> <div id="nav-tag-vendor-voice"> <a href="#subnav-box-nav-tag-vendor-voice" data-toggle-for="subnav-box-nav-tag-vendor-voice" class="topnav_elem mob_only">Vendor Voice</a> <h2 class="desk_only section_nav-tag-vendor-voice"> <a href="#subnav-box-nav-tag-vendor-voice" data-toggle-for="subnav-box-nav-tag-vendor-voice" class="topnav_elem desk_only">Vendor Voice</a> </h2> </div> </div> <div id="subnav-box-nav-tag-vendor-voice" class="subnav_box"> <a href="https://www.theregister.com/VendorVoice/" class="subnav_elem" id="nav-tag-vendor-voice-all"> <span class="prefix_all">All </span>Vendor Voice </a> <a href="https://www.theregister.com/VendorVoice/aws_here/" class="subnav_elem" id="nav-tag-vendor-voice-vv_aws_here"> HERE and AWS </a> <a href="https://www.theregister.com/VendorVoice/aws_vonage/" class="subnav_elem" id="nav-tag-vendor-voice-vv_aws_vonage"> Vonage </a> <a href="https://www.theregister.com/VendorVoice/aws_amdocs/" class="subnav_elem" id="nav-tag-vendor-voice-vv_aws_amdocs"> Amdocs </a> <a href="https://www.theregister.com/VendorVoice/aws_ge_vernova_manufacturing/" class="subnav_elem" id="nav-tag-vendor-voice-vv_aws_ge_vernova_manufacturing"> GE Vernova with AWS </a> <a href="https://www.theregister.com/VendorVoice/aws_ge_vernova/" class="subnav_elem" id="nav-tag-vendor-voice-vv_aws_ge_vernova"> GE Vernova with AWS </a> <a href="https://www.theregister.com/VendorVoice/siemens_aws/" class="subnav_elem" id="nav-tag-vendor-voice-vv_siemens_aws"> Siemens and AWS Gen AI </a> <a href="https://www.theregister.com/VendorVoice/siemens_aws_itot/" class="subnav_elem" id="nav-tag-vendor-voice-vv_siemens_aws_itot"> Siemens and AWS IT/OT </a> <a href="https://www.theregister.com/VendorVoice/aws_new_horizon_solutions/" class="subnav_elem" id="nav-tag-vendor-voice-vv_aws_new_horizon_solutions"> Amazon Web Services (AWS) New Horizon in Cloud Computing </a> <a href="https://www.theregister.com/VendorVoice/ddn/" class="subnav_elem" id="nav-tag-vendor-voice-vv_ddn"> DDN </a> <a href="https://www.theregister.com/VendorVoice/google_cloud_data_transformation/" class="subnav_elem" id="nav-tag-vendor-voice-vv_google_cloud_data_transformation"> Google Cloud Data Transformation </a> <a href="https://www.theregister.com/VendorVoice/google_gemini/" class="subnav_elem" id="nav-tag-vendor-voice-vv_google_gemini"> Google Gemini </a> <a href="https://www.theregister.com/VendorVoice/hpe_greenlake/" class="subnav_elem" id="nav-tag-vendor-voice-vv_hpe_greenlake"> Hewlett Packard Enterprise: Edge-to-Cloud Platform </a> <a href="https://www.theregister.com/VendorVoice/intelvpro/" class="subnav_elem" id="nav-tag-vendor-voice-vv_intelvpro"> Intel vPro </a> <a href="https://www.theregister.com/VendorVoice/vmware/" class="subnav_elem" id="nav-tag-vendor-voice-vv_vmware"> VMware </a> <noscript> <a href="#masthead" class="subnav_elem close_box" aria-label="Top navigation">(X)</a> </noscript> </div> </div> </nav> </div> <div class="nav_bottom_section nav_resources"> <div class="nav_head_bk"> <a href="#subnav-box-nav-resources" data-toggle-for="subnav-box-nav-resources" id="nav-resources" class="topnav_elem mob_only">Resources</a> <h2 class="main_head"> <span class="topnav_elem desk_only">Resources</span> </h2> </div> <nav id="top_nav"> <div class="nav_elem"> <div id="subnav-box-nav-resources" class="subnav_box"> <a href="https://whitepapers.theregister.com/">Whitepapers</a> <a href="https://whitepapers.theregister.com/events/list/">Webinars & Events</a> <a href="https://account.theregister.com/edit/newsletter/">Newsletters</a> </div> </div> </nav> </div> </div> </div> </div> </div> </div> </div> <div aria-hidden="true" class="adun" data-pos="top" data-raptor="condor" data-xmd=",fluid,leaderboard," data-lg=",fluid,leaderboard," data-xlg=",fluid,superleaderboard,billboard,leaderboard," data-xxlg=",fluid,superleaderboard,billboard,brandwidth,leaderboard,"> <noscript> <a href="https://pubads.g.doubleclick.net/gampad/jump?co=1&iu=/6978/reg_security/cybercrime&sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&tile=2&c=2Z0Kq3XKFsntpXb-3spyG2QAAAMA&t=ct%3Dns%26unitnum%3D2%26raptor%3Dcondor%26pos%3Dtop%26test%3D0" target="_blank"> <img src="https://pubads.g.doubleclick.net/gampad/ad?co=1&iu=/6978/reg_security/cybercrime&sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&tile=2&c=2Z0Kq3XKFsntpXb-3spyG2QAAAMA&t=ct%3Dns%26unitnum%3D2%26raptor%3Dcondor%26pos%3Dtop%26test%3D0" alt=""> </a> </noscript> </div> <article> <div id=top-col-story> <div class="header_left"> <div class="cat_header"> <h4 class="dcl"> <a href="/security/cyber_crime/" aria-label="Cyber-crime">Cyber-crime</a> </h4> </div> <div class="comments_wrap mobile_only"> <a class="comment_count" aria-label="Read comments on this article, currently there are 25 comments" title="View comments on this article" href="https://forums.theregister.com/forum/all/2024/06/28/teamviewer_network_breach/"> <strong aria-hidden="true">25</strong> <img aria-hidden="true" width="18" height="16" alt="comment bubble on white" src="/design_picker/f5daacc84b9722c1e31ba85f836c37e4ad993fc4/graphics/icons/bubble_comment_white.png" srcset="/design_picker/f5daacc84b9722c1e31ba85f836c37e4ad993fc4/graphics/icons/bubble_comment_white.svg"> </a> </div> </div> <div class="header_right"> <h1>TeamViewer can't bring itself to say someone broke into its network – but it happened</h1> </div> <div class="header_left"> <div class="comments_wrap desktop_only"> <a class="comment_count" aria-label="Read comments on this article, currently there are 25 comments" title="View comments on this article" href="https://forums.theregister.com/forum/all/2024/06/28/teamviewer_network_breach/"> <strong aria-hidden="true">25</strong> <img aria-hidden="true" width="18" height="16" alt="comment bubble on white" src="/design_picker/f5daacc84b9722c1e31ba85f836c37e4ad993fc4/graphics/icons/bubble_comment_white.png" srcset="/design_picker/f5daacc84b9722c1e31ba85f836c37e4ad993fc4/graphics/icons/bubble_comment_white.svg"> </a> </div> </div> <div class="header_right"> <h2>Claims customer data, prod environment not affected as NCC sounds alarm</h2> <div class="byline_and_dateline_and_share_and_comments"> <div class="byline_wrap"> <img class="vulture_icon" src="/design_picker/d518b499f8a6e2c65d4d8c49aca8299d54b03012/graphics/icon/vulture_red.svg" alt="icon"> <a class="byline" href="/Author/Jessica-Lyons" title="Read more by this author"> Jessica Lyons </a> </div> <div class="dateline_wrap"> <span class="dateline"> Fri 28 Jun 2024 <span class="slashes"> // </span> 00:37 UTC </span> </div> </div> </div> </div> <div id=main-col> <div id="article-wrapper" class="article_wrap"> <div class="left_col"> <div class="floating_bar"> <div class="sharing_widget_story_desktop uses_overlay"> <button class="top_blob" aria-label="Share this story" title="Share this story"> <img width="25" height="25" src="/design_picker/d2e337b97204af4aa34dda04c4e5d56d954b216f/graphics/icons/social_share_icon.svg" alt=""> </button> <div class="sharing_widget_overlay" id="sharing_widget_overlay_2"> <div class="sharing_box"> <a data-social="reddit" href="https://www.reddit.com/submit?url=https://www.theregister.com/2024/06/28/teamviewer_network_breach/%3futm_medium%3dshare%26utm_content%3darticle%26utm_source%3dreddit&title=TeamViewer%20can%27t%20bring%20itself%20to%20say%20someone%20broke%20into%20its%20network%20%e2%80%93%20but%20it%20happened" target="_blank"> </a> <a data-social="twitter" class="twit" href="https://twitter.com/intent/tweet?text=TeamViewer%20can%27t%20bring%20itself%20to%20say%20someone%20broke%20into%20its%20network%20%e2%80%93%20but%20it%20happened&url=https://www.theregister.com/2024/06/28/teamviewer_network_breach/%3futm_medium%3dshare%26utm_content%3darticle%26utm_source%3dtwitter&via=theregister" target="_blank"> </a> <a data-social="facebook" class="faceb_dialog" href="https://www.facebook.com/dialog/feed?app_id=1404095453459035&display=popup&link=https://www.theregister.com/2024/06/28/teamviewer_network_breach/%3futm_medium%3dshare%26utm_content%3darticle%26utm_source%3dfacebook" target="_blank"> </a> <br class="hide_after_sm"> <a data-social="linkedin" class="linkedin_social" href="https://www.linkedin.com/shareArticle?mini=true&url=https://www.theregister.com/2024/06/28/teamviewer_network_breach/%3futm_medium%3dshare%26utm_content%3darticle%26utm_source%3dlinkedin&title=TeamViewer%20can%27t%20bring%20itself%20to%20say%20someone%20broke%20into%20its%20network%20%e2%80%93%20but%20it%20happened&summary=Claims%20customer%20data%2c%20prod%20environment%20not%20affected%20as%20NCC%20sounds%20alarm" target="_blank"> </a> <a data-social="whatsapp" href="https://api.whatsapp.com/send?text=https://www.theregister.com/2024/06/28/teamviewer_network_breach/%3futm_medium%3dshare%26utm_content%3darticle%26utm_source%3dwhatsapp" target="_blank"> </a> </div> </div> </div> </div> <div class="promo_advert"> </div> </div> <div class="centre_col"> <div id="article"> <div id="body"> <p><span class="label">Updated</span> TeamViewer on Thursday said its security team just "detected an irregularity" within one of its networks – which is a fancy way of saying someone broke in.</p> <p>We're told this "irregularity" was spotted inside TeamViewer's corporate IT environment on Wednesday, and that the biz immediately called in reinforcements in the form of cyber security investigators, implemented "necessary remediation measures," and activated its incident response team and processes, according to an <a target="_blank" rel="nofollow" href="https://www.teamviewer.com/en/resources/trust-center/statement/?">announcement</a> on Thursday.</p> <p>TeamViewer sells software to remotely control and manage Windows PCs and other computers as well as tools to access systems via the web, and is used the world over. The words "TeamViewer" and "security breach" will make some people's blood run cold given how pervasively it is used; a compromise of the platform could be devastating. TeamViewer says it has more than 600,000 customers.</p> <div aria-hidden="true" class="adun" data-pos="top" data-raptor="condor" data-xsm=",fluid,mpu," data-sm=",fluid,mpu," data-md=",fluid,mpu,"> <noscript> <a href="https://pubads.g.doubleclick.net/gampad/jump?co=1&iu=/6978/reg_security/cybercrime&sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&tile=2&c=2Z0Kq3XKFsntpXb-3spyG2QAAAMA&t=ct%3Dns%26unitnum%3D2%26raptor%3Dcondor%26pos%3Dtop%26test%3D0" target="_blank"> <img src="https://pubads.g.doubleclick.net/gampad/ad?co=1&iu=/6978/reg_security/cybercrime&sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&tile=2&c=2Z0Kq3XKFsntpXb-3spyG2QAAAMA&t=ct%3Dns%26unitnum%3D2%26raptor%3Dcondor%26pos%3Dtop%26test%3D0" alt=""> </a> </noscript> </div> <p>Regardless, the software maker's disclosure attempted to downplay the intrusion – sorry, "irregularity."</p> <div aria-hidden="true" class="adun" data-pos="top" data-raptor="falcon" data-xmd=",fluid,mpu,leaderboard," data-lg=",fluid,mpu,leaderboard," data-xlg=",fluid,billboard,superleaderboard,mpu,leaderboard," data-xxlg=",fluid,billboard,superleaderboard,brandwidth,brandimpact,leaderboard,mpu,"> <noscript> <a href="https://pubads.g.doubleclick.net/gampad/jump?co=1&iu=/6978/reg_security/cybercrime&sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&tile=4&c=44Z0Kq3XKFsntpXb-3spyG2QAAAMA&t=ct%3Dns%26unitnum%3D4%26raptor%3Dfalcon%26pos%3Dmid%26test%3D0" target="_blank"> <img src="https://pubads.g.doubleclick.net/gampad/ad?co=1&iu=/6978/reg_security/cybercrime&sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&tile=4&c=44Z0Kq3XKFsntpXb-3spyG2QAAAMA&t=ct%3Dns%26unitnum%3D426raptor%3Dfalcon%26pos%3Dmid%26test%3D0" alt=""> </a> </noscript> </div> <div class="adun_eagle_desktop_story_wrapper"> <div aria-hidden="true" class="adun" data-pos="mid" data-raptor="eagle" data-xxlg=",mpu,dmpu,"> <noscript> <a href="https://pubads.g.doubleclick.net/gampad/jump?co=1&iu=/6978/reg_security/cybercrime&sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&tile=3&c=33Z0Kq3XKFsntpXb-3spyG2QAAAMA&t=ct%3Dns%26unitnum%3D3%26raptor%3Deagle%26pos%3Dmid%26test%3D0" target="_blank"> <img src="https://pubads.g.doubleclick.net/gampad/ad?co=1&iu=/6978/reg_security/cybercrime&sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&tile=3&c=33Z0Kq3XKFsntpXb-3spyG2QAAAMA&t=ct%3Dns%26unitnum%3D3%26raptor%3Deagle%26pos%3Dmid%26test%3D0" alt=""> </a> </noscript> </div> </div> <p>"TeamViewer's internal corporate IT environment is completely independent from the product environment," it read. "There is no evidence to suggest that the product environment or customer data is affected."</p> <p>But, it added, "investigations are ongoing and our primary focus remains to ensure the integrity of our systems."</p> <div aria-hidden="true" class="adun" data-pos="top" data-raptor="falcon" data-xsm=",fluid,mpu," data-sm=",fluid,mpu," data-md=",fluid,mpu,"> <noscript> <a href="https://pubads.g.doubleclick.net/gampad/jump?co=1&iu=/6978/reg_security/cybercrime&sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&tile=4&c=44Z0Kq3XKFsntpXb-3spyG2QAAAMA&t=ct%3Dns%26unitnum%3D4%26raptor%3Dfalcon%26pos%3Dmid%26test%3D0" target="_blank"> <img src="https://pubads.g.doubleclick.net/gampad/ad?co=1&iu=/6978/reg_security/cybercrime&sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&tile=4&c=44Z0Kq3XKFsntpXb-3spyG2QAAAMA&t=ct%3Dns%26unitnum%3D426raptor%3Dfalcon%26pos%3Dmid%26test%3D0" alt=""> </a> </noscript> </div> <p>TeamViewer spokesperson Maria Gordienko declined to answer <em>The Register</em>'s specific questions about the incident – including whether it was ransomware or worse – citing the ongoing investigation. "As soon as new relevant facts become available, we will update the statement for the general public," she deflected. </p> <ul class="listinks"> <li><a href="https://www.theregister.com/2024/06/27/whispergate_malware_suspect_bounty/">WhisperGate suspect indicted as US offers a $10M bounty for his capture</a></li> <li><a href="https://www.theregister.com/2024/06/25/nca_fbi_qilin_ransomware/">UK and US cops band together to tackle Qilin's ransomware shakedowns</a></li> <li><a href="https://www.theregister.com/2024/06/26/batten_down_the_hatches_its/">Batten down the hatches, it's time to patch some more MOVEit bugs</a></li> <li><a href="https://www.theregister.com/2024/06/25/polyfillio_china_crisis/">If you're using Polyfill.io code on your site – like 100,000+ are – remove it immediately</a></li> </ul> <p>It appears top infosec house NCC Group has already tipped off its customers to the security snafu, and blamed an unnamed advanced persistent threat (APT) team.</p> <p>"The NCC Group Global Threat Intelligence team has been made aware of significant compromise of the TeamViewer remote access and support platform by an APT group," NCC warned in a memo, shared earlier <a target="_blank" rel="nofollow" href="https://infosec.exchange/@jtig/112689362692682679">on Mastodon</a> by an IT security pro going by the name Jeffrey.</p> <p>"Due to the widespread usage of this software the following alert is being circulated securely to our customers," the shared missive, confirmed as legit by NCC, continued. We've asked for the security group for further details for the public.</p> <p>And speaking of TeamViewer and APTs, Brett Callow, threat analyst at Emsisoft, <a target="_blank" rel="nofollow" href="https://x.com/BrettCallow/status/1806438927336878158">pointed</a> to an <a target="_blank" rel="nofollow" href="https://www.aha.org/news/headline/2024-06-27-bulletin-alerts-health-sector-cyberthreat-exploits-teamviewer">alert Thursday</a> by the US-based Health Information Sharing and Analysis Center (H-ISAC) to the health sector about ongoing exploitation of TeamViewer and how healthcare operators should respond.</p> <div aria-hidden="true" class="adun" id="story_eagle_xsm_sm_md_xmd_lg_xlg" data-pos="mid" data-raptor="eagle" data-xsm=",mpu,dmpu," data-sm=",mpu,dmpu," data-md=",mpu,dmpu," data-xmd=",mpu,dmpu," data-lg=",mpu,dmpu," data-xlg=",mpu,dmpu,"> <noscript> <a href="https://pubads.g.doubleclick.net/gampad/jump?co=1&iu=/6978/reg_security/cybercrime&sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&tile=3&c=33Z0Kq3XKFsntpXb-3spyG2QAAAMA&t=ct%3Dns%26unitnum%3D3%26raptor%3Deagle%26pos%3Dmid%26test%3D0" target="_blank"> <img src="https://pubads.g.doubleclick.net/gampad/ad?co=1&iu=/6978/reg_security/cybercrime&sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&tile=3&c=33Z0Kq3XKFsntpXb-3spyG2QAAAMA&t=ct%3Dns%26unitnum%3D3%26raptor%3Deagle%26pos%3Dmid%26test%3D0" alt=""> </a> </noscript> </div> <p>That memo reads:</p> <div class="blockextract"> <p>The Health Information Sharing and Analysis Center June 27 issued a threat bulletin alerting the health sector to active cyberthreats exploiting TeamViewer. H-ISAC recommends users review logs for any unusual remote desktop traffic. Threat actors have been observed leveraging remote access tools, H-ISAC said. The agency recommends users enable two-factor authentication and use the allowlist and blocklist to control who can connect to their devices, among other measures.</p> </div> <p>H-ISAC noted in its <a target="_blank" rel="nofollow" href="https://infosec.exchange/@jtig/112689665815283809">industry bulletin</a> that it had been warned by a friendly intel partner that APT29 – aka Russian intelligence's <a target="_blank" href="https://www.theregister.com/2024/02/27/russia_cozy_bear_new_ttps/">Cozy Bear</a> crew – has been "actively exploiting Teamviewer."</p> <p>"TeamViewer has been observed being exploited by threat actors associated with APT29," it added.</p> <p>Which could mean the Russians are separately exploiting weaknesses within TeamViewer to get into people's networks, or taking advantage of poor customer-side security to get in via the remote-desktop software. Or H-ISAC is saying the aforementioned intrusion was carried out by the Kremlin into TeamViewer's own systems.</p> <p>We're seeking further details and will let you know when we hear more. ®</p> <h3 class="crosshead">Updated to add</h3> <p>TeamViewer has <a target="_blank" href="https://www.theregister.com/2024/06/28/teamviewer_russia/">confirmed</a> it was hit by Russia's APT29 aka Cozy Bear.</p> <div class="wptl btm"> <noscript><strong>Get our</strong> <a href="https://whitepapers.theregister.com/" style="text-transform:uppercase">Tech Resources</a></noscript> </div> </div> <div class="article_body_btm mobile_only"> <div class="sharing_widget_story_desktop uses_overlay"> <button class="top_blob" aria-label="Share this story" title="Share this story"> <img width="25" height="25" src="/design_picker/d2e337b97204af4aa34dda04c4e5d56d954b216f/graphics/icons/social_share_icon.svg" alt=""> <span>Share</span> </button> <div class="sharing_widget_overlay" id="sharing_widget_overlay_3"> <div class="sharing_box"> <a data-social="reddit" href="https://www.reddit.com/submit?url=https://www.theregister.com/2024/06/28/teamviewer_network_breach/%3futm_medium%3dshare%26utm_content%3darticle%26utm_source%3dreddit&title=TeamViewer%20can%27t%20bring%20itself%20to%20say%20someone%20broke%20into%20its%20network%20%e2%80%93%20but%20it%20happened" target="_blank"> </a> <a data-social="twitter" class="twit" href="https://twitter.com/intent/tweet?text=TeamViewer%20can%27t%20bring%20itself%20to%20say%20someone%20broke%20into%20its%20network%20%e2%80%93%20but%20it%20happened&url=https://www.theregister.com/2024/06/28/teamviewer_network_breach/%3futm_medium%3dshare%26utm_content%3darticle%26utm_source%3dtwitter&via=theregister" target="_blank"> </a> <a data-social="facebook" class="faceb_dialog" href="https://www.facebook.com/dialog/feed?app_id=1404095453459035&display=popup&link=https://www.theregister.com/2024/06/28/teamviewer_network_breach/%3futm_medium%3dshare%26utm_content%3darticle%26utm_source%3dfacebook" target="_blank"> </a> <br class="hide_after_sm"> <a data-social="linkedin" class="linkedin_social" href="https://www.linkedin.com/shareArticle?mini=true&url=https://www.theregister.com/2024/06/28/teamviewer_network_breach/%3futm_medium%3dshare%26utm_content%3darticle%26utm_source%3dlinkedin&title=TeamViewer%20can%27t%20bring%20itself%20to%20say%20someone%20broke%20into%20its%20network%20%e2%80%93%20but%20it%20happened&summary=Claims%20customer%20data%2c%20prod%20environment%20not%20affected%20as%20NCC%20sounds%20alarm" target="_blank"> </a> <a data-social="whatsapp" href="https://api.whatsapp.com/send?text=https://www.theregister.com/2024/06/28/teamviewer_network_breach/%3futm_medium%3dshare%26utm_content%3darticle%26utm_source%3dwhatsapp" target="_blank"> </a> </div> </div> </div> </div> </div> </div> <div class="right_col desktop_only"> <div class="similar_topics"> <div class="similar_topics"> <h4>More about</h4> <ul class="keywords"> <li> <a href="/Tag/Cybercrime/" > <span class="keyword_name"> Cybercrime </span> </a> </li> <li> <a href="/Tag/Security/" > <span class="keyword_name"> Security </span> </a> </li> <li> <a href="/Tag/TeamViewer/" > <span class="keyword_name"> TeamViewer </span> </a> </li> </ul> </div> <div class="keyword_wrap" style="display: none;"> <div class="keyword_trigger">More like these</div> </div> <div class="lightbox_overlay"> <div class="keyword_popup more_topics"> <div class="close">×</div> <div class="keyword_group similar_topics"> <h3>More about</h3> <ul class="keywords"> <li> <a href="/Tag/Cybercrime/" > <span class="keyword_name"> Cybercrime </span> </a> </li> <li> <a href="/Tag/Security/" > <span class="keyword_name"> Security </span> </a> </li> <li> <a href="/Tag/TeamViewer/" > <span class="keyword_name"> TeamViewer </span> </a> </li> </ul> </div> <div class="keyword_group child_topics"> <h3>Narrower topics</h3> <ul class="keywords"> <li> <a href="/Tag/2FA/" > <span class="keyword_name"> 2FA </span> </a> </li> <li> <a href="/Tag/Advanced%20persistent%20threat/" > <span class="keyword_name"> Advanced persistent threat </span> </a> </li> <li> <a href="/Tag/Application%20Delivery%20Controller/" > <span class="keyword_name"> Application Delivery Controller </span> </a> </li> <li> <a href="/Tag/Authentication/" > <span class="keyword_name"> Authentication </span> </a> </li> <li> <a href="/Tag/BEC/" > <span class="keyword_name"> BEC </span> </a> </li> <li> <a href="/Tag/Black%20Hat/" > <span class="keyword_name"> Black Hat </span> </a> </li> <li> <a href="/Tag/BSides/" > <span class="keyword_name"> BSides </span> </a> </li> <li> <a href="/Tag/Bug%20Bounty/" > <span class="keyword_name"> Bug Bounty </span> </a> </li> <li> <a href="/Tag/CHERI/" > <span class="keyword_name"> CHERI </span> </a> </li> <li> <a href="/Tag/Common%20Vulnerability%20Scoring%20System/" > <span class="keyword_name"> Common Vulnerability Scoring System </span> </a> </li> <li> <a href="/Tag/Cybersecurity/" > <span class="keyword_name"> Cybersecurity </span> </a> </li> <li> <a href="/Tag/Cybersecurity%20and%20Infrastructure%20Security%20Agency/" > <span class="keyword_name"> Cybersecurity and Infrastructure Security Agency </span> </a> </li> <li> <a href="/Tag/Cybersecurity%20Information%20Sharing%20Act/" > <span class="keyword_name"> Cybersecurity Information Sharing Act </span> </a> </li> <li> <a href="/Tag/Data%20Breach/" > <span class="keyword_name"> Data Breach </span> </a> </li> <li> <a href="/Tag/Data%20Protection/" > <span class="keyword_name"> Data Protection </span> </a> </li> <li> <a href="/Tag/Data%20Theft/" > <span class="keyword_name"> Data Theft </span> </a> </li> <li> <a href="/Tag/DDoS/" > <span class="keyword_name"> DDoS </span> </a> </li> <li> <a href="/Tag/DEF%20CON/" > <span class="keyword_name"> DEF CON </span> </a> </li> <li> <a href="/Tag/Digital%20certificate/" > <span class="keyword_name"> Digital certificate </span> </a> </li> <li> <a href="/Tag/Encryption/" > <span class="keyword_name"> Encryption </span> </a> </li> <li> <a href="/Tag/Exploit/" > <span class="keyword_name"> Exploit </span> </a> </li> <li> <a href="/Tag/Firewall/" > <span class="keyword_name"> Firewall </span> </a> </li> <li> <a href="/Tag/Hacker/" > <span class="keyword_name"> Hacker </span> </a> </li> <li> <a href="/Tag/Hacking/" > <span class="keyword_name"> Hacking </span> </a> </li> <li> <a href="/Tag/Hacktivism/" > <span class="keyword_name"> Hacktivism </span> </a> </li> <li> <a href="/Tag/Identity%20Theft/" > <span class="keyword_name"> Identity Theft </span> </a> </li> <li> <a href="/Tag/Incident%20response/" > <span class="keyword_name"> Incident response </span> </a> </li> <li> <a href="/Tag/Infosec/" > <span class="keyword_name"> Infosec </span> </a> </li> <li> <a href="/Tag/Kenna%20Security/" > <span class="keyword_name"> Kenna Security </span> </a> </li> <li> <a href="/Tag/NCSAM/" > <span class="keyword_name"> NCSAM </span> </a> </li> <li> <a href="/Tag/NCSC/" > <span class="keyword_name"> NCSC </span> </a> </li> <li> <a href="/Tag/Palo%20Alto%20Networks/" > <span class="keyword_name"> Palo Alto Networks </span> </a> </li> <li> <a href="/Tag/Password/" > <span class="keyword_name"> Password </span> </a> </li> <li> <a href="/Tag/Phishing/" > <span class="keyword_name"> Phishing </span> </a> </li> <li> <a href="/Tag/Quantum%20key%20distribution/" > <span class="keyword_name"> Quantum key distribution </span> </a> </li> <li> <a href="/Tag/Ransomware/" > <span class="keyword_name"> Ransomware </span> </a> </li> <li> <a href="/Tag/Remote%20Access%20Trojan/" > <span class="keyword_name"> Remote Access Trojan </span> </a> </li> <li> <a href="/Tag/REvil/" > <span class="keyword_name"> REvil </span> </a> </li> <li> <a href="/Tag/RSA%20Conference/" > <span class="keyword_name"> RSA Conference </span> </a> </li> <li> <a href="/Tag/Spamming/" > <span class="keyword_name"> Spamming </span> </a> </li> <li> <a href="/Tag/Spyware/" > <span class="keyword_name"> Spyware </span> </a> </li> <li> <a href="/Tag/Surveillance/" > <span class="keyword_name"> Surveillance </span> </a> </li> <li> <a href="/Tag/TLS/" > <span class="keyword_name"> TLS </span> </a> </li> <li> <a href="/Tag/Trojan/" > <span class="keyword_name"> Trojan </span> </a> </li> <li> <a href="/Tag/Trusted%20Platform%20Module/" > <span class="keyword_name"> Trusted Platform Module </span> </a> </li> <li> <a href="/Tag/Vulnerability/" > <span class="keyword_name"> Vulnerability </span> </a> </li> <li> <a href="/Tag/Wannacry/" > <span class="keyword_name"> Wannacry </span> </a> </li> <li> <a href="/Tag/Zero%20trust/" > <span class="keyword_name"> Zero trust </span> </a> </li> </ul> </div> </div> </div> </div> </div> <div class="right_col mobile_only"> <div class="similar_topics"> <h4>More about</h4> </div> </div> <div class="left_col main_content"> <div class="sharing_block"> <div class=article_body_btm> <div class="sharing_widget_story_desktop uses_overlay"> <button class="top_blob" aria-label="Share this story" title="Share this story"> <img width="25" height="25" src="/design_picker/d2e337b97204af4aa34dda04c4e5d56d954b216f/graphics/icons/social_share_icon.svg" alt=""> <span>Share</span> </button> <div class="sharing_widget_overlay" id="sharing_widget_overlay_4"> <div class="sharing_box"> <a data-social="reddit" href="https://www.reddit.com/submit?url=https://www.theregister.com/2024/06/28/teamviewer_network_breach/%3futm_medium%3dshare%26utm_content%3darticle%26utm_source%3dreddit&title=TeamViewer%20can%27t%20bring%20itself%20to%20say%20someone%20broke%20into%20its%20network%20%e2%80%93%20but%20it%20happened" target="_blank"> </a> <a data-social="twitter" class="twit" href="https://twitter.com/intent/tweet?text=TeamViewer%20can%27t%20bring%20itself%20to%20say%20someone%20broke%20into%20its%20network%20%e2%80%93%20but%20it%20happened&url=https://www.theregister.com/2024/06/28/teamviewer_network_breach/%3futm_medium%3dshare%26utm_content%3darticle%26utm_source%3dtwitter&via=theregister" target="_blank"> </a> <a data-social="facebook" class="faceb_dialog" href="https://www.facebook.com/dialog/feed?app_id=1404095453459035&display=popup&link=https://www.theregister.com/2024/06/28/teamviewer_network_breach/%3futm_medium%3dshare%26utm_content%3darticle%26utm_source%3dfacebook" target="_blank"> </a> <br class="hide_after_sm"> <a data-social="linkedin" class="linkedin_social" href="https://www.linkedin.com/shareArticle?mini=true&url=https://www.theregister.com/2024/06/28/teamviewer_network_breach/%3futm_medium%3dshare%26utm_content%3darticle%26utm_source%3dlinkedin&title=TeamViewer%20can%27t%20bring%20itself%20to%20say%20someone%20broke%20into%20its%20network%20%e2%80%93%20but%20it%20happened&summary=Claims%20customer%20data%2c%20prod%20environment%20not%20affected%20as%20NCC%20sounds%20alarm" target="_blank"> </a> <a data-social="whatsapp" href="https://api.whatsapp.com/send?text=https://www.theregister.com/2024/06/28/teamviewer_network_breach/%3futm_medium%3dshare%26utm_content%3darticle%26utm_source%3dwhatsapp" target="_blank"> </a> </div> </div> </div> </div> </div> </div> <div class="centre_col main_content"> <div class="comments "> <a class="comment_count" aria-label="Read comments on this article, currently there are 25 comments" title="View comments on this article" href="https://forums.theregister.com/forum/all/2024/06/28/teamviewer_network_breach/"> <strong aria-hidden="true">25</strong> <img aria-hidden="true" width="18" height="16" alt="comment bubble on white" src="/design_picker/f5daacc84b9722c1e31ba85f836c37e4ad993fc4/graphics/icons/bubble_comment_white.png" srcset="/design_picker/f5daacc84b9722c1e31ba85f836c37e4ad993fc4/graphics/icons/bubble_comment_white.svg"> COMMENTS </a> </div> </div> <div class="hidden_col mobile_only"> <div class="similar_topics"> <h4>More about</h4> <ul class="keywords"> <li> <a href="/Tag/Cybercrime/" > <span class="keyword_name"> Cybercrime </span> </a> </li> <li> <a href="/Tag/Security/" > <span class="keyword_name"> Security </span> </a> </li> <li> <a href="/Tag/TeamViewer/" > <span class="keyword_name"> TeamViewer </span> </a> </li> </ul> </div> <div class="keyword_wrap" style="display: none;"> <div class="keyword_trigger">More like these</div> </div> <div class="lightbox_overlay"> <div class="keyword_popup more_topics"> <div class="close">×</div> <div class="keyword_group similar_topics"> <h3>More about</h3> <ul class="keywords"> <li> <a href="/Tag/Cybercrime/" > <span class="keyword_name"> Cybercrime </span> </a> </li> <li> <a href="/Tag/Security/" > <span class="keyword_name"> Security </span> </a> </li> <li> <a href="/Tag/TeamViewer/" > <span class="keyword_name"> TeamViewer </span> </a> </li> </ul> </div> <div class="keyword_group child_topics"> <h3>Narrower topics</h3> <ul class="keywords"> <li> <a href="/Tag/2FA/" > <span class="keyword_name"> 2FA </span> </a> </li> <li> <a href="/Tag/Advanced%20persistent%20threat/" > <span class="keyword_name"> Advanced persistent threat </span> </a> </li> <li> <a href="/Tag/Application%20Delivery%20Controller/" > <span class="keyword_name"> Application Delivery Controller </span> </a> </li> <li> <a href="/Tag/Authentication/" > <span class="keyword_name"> Authentication </span> </a> </li> <li> <a href="/Tag/BEC/" > <span class="keyword_name"> BEC </span> </a> </li> <li> <a href="/Tag/Black%20Hat/" > <span class="keyword_name"> Black Hat </span> </a> </li> <li> <a href="/Tag/BSides/" > <span class="keyword_name"> BSides </span> </a> </li> <li> <a href="/Tag/Bug%20Bounty/" > <span class="keyword_name"> Bug Bounty </span> </a> </li> <li> <a href="/Tag/CHERI/" > <span class="keyword_name"> CHERI </span> </a> </li> <li> <a href="/Tag/Common%20Vulnerability%20Scoring%20System/" > <span class="keyword_name"> Common Vulnerability Scoring System </span> </a> </li> <li> <a href="/Tag/Cybersecurity/" > <span class="keyword_name"> Cybersecurity </span> </a> </li> <li> <a href="/Tag/Cybersecurity%20and%20Infrastructure%20Security%20Agency/" > <span class="keyword_name"> Cybersecurity and Infrastructure Security Agency </span> </a> </li> <li> <a href="/Tag/Cybersecurity%20Information%20Sharing%20Act/" > <span class="keyword_name"> Cybersecurity Information Sharing Act </span> </a> </li> <li> <a href="/Tag/Data%20Breach/" > <span class="keyword_name"> Data Breach </span> </a> </li> <li> <a href="/Tag/Data%20Protection/" > <span class="keyword_name"> Data Protection </span> </a> </li> <li> <a href="/Tag/Data%20Theft/" > <span class="keyword_name"> Data Theft </span> </a> </li> <li> <a href="/Tag/DDoS/" > <span class="keyword_name"> DDoS </span> </a> </li> <li> <a href="/Tag/DEF%20CON/" > <span class="keyword_name"> DEF CON </span> </a> </li> <li> <a href="/Tag/Digital%20certificate/" > <span class="keyword_name"> Digital certificate </span> </a> </li> <li> <a href="/Tag/Encryption/" > <span class="keyword_name"> Encryption </span> </a> </li> <li> <a href="/Tag/Exploit/" > <span class="keyword_name"> Exploit </span> </a> </li> <li> <a href="/Tag/Firewall/" > <span class="keyword_name"> Firewall </span> </a> </li> <li> <a href="/Tag/Hacker/" > <span class="keyword_name"> Hacker </span> </a> </li> <li> <a href="/Tag/Hacking/" > <span class="keyword_name"> Hacking </span> </a> </li> <li> <a href="/Tag/Hacktivism/" > <span class="keyword_name"> Hacktivism </span> </a> </li> <li> <a href="/Tag/Identity%20Theft/" > <span class="keyword_name"> Identity Theft </span> </a> </li> <li> <a href="/Tag/Incident%20response/" > <span class="keyword_name"> Incident response </span> </a> </li> <li> <a href="/Tag/Infosec/" > <span class="keyword_name"> Infosec </span> </a> </li> <li> <a href="/Tag/Kenna%20Security/" > <span class="keyword_name"> Kenna Security </span> </a> </li> <li> <a href="/Tag/NCSAM/" > <span class="keyword_name"> NCSAM </span> </a> </li> <li> <a href="/Tag/NCSC/" > <span class="keyword_name"> NCSC </span> </a> </li> <li> <a href="/Tag/Palo%20Alto%20Networks/" > <span class="keyword_name"> Palo Alto Networks </span> </a> </li> <li> <a href="/Tag/Password/" > <span class="keyword_name"> Password </span> </a> </li> <li> <a href="/Tag/Phishing/" > <span class="keyword_name"> Phishing </span> </a> </li> <li> <a href="/Tag/Quantum%20key%20distribution/" > <span class="keyword_name"> Quantum key distribution </span> </a> </li> <li> <a href="/Tag/Ransomware/" > <span class="keyword_name"> Ransomware </span> </a> </li> <li> <a href="/Tag/Remote%20Access%20Trojan/" > <span class="keyword_name"> Remote Access Trojan </span> </a> </li> <li> <a href="/Tag/REvil/" > <span class="keyword_name"> REvil </span> </a> </li> <li> <a href="/Tag/RSA%20Conference/" > <span class="keyword_name"> RSA Conference </span> </a> </li> <li> <a href="/Tag/Spamming/" > <span class="keyword_name"> Spamming </span> </a> </li> <li> <a href="/Tag/Spyware/" > <span class="keyword_name"> Spyware </span> </a> </li> <li> <a href="/Tag/Surveillance/" > <span class="keyword_name"> Surveillance </span> </a> </li> <li> <a href="/Tag/TLS/" > <span class="keyword_name"> TLS </span> </a> </li> <li> <a href="/Tag/Trojan/" > <span class="keyword_name"> Trojan </span> </a> </li> <li> <a href="/Tag/Trusted%20Platform%20Module/" > <span class="keyword_name"> Trusted Platform Module </span> </a> </li> <li> <a href="/Tag/Vulnerability/" > <span class="keyword_name"> Vulnerability </span> </a> </li> <li> <a href="/Tag/Wannacry/" > <span class="keyword_name"> Wannacry </span> </a> </li> <li> <a href="/Tag/Zero%20trust/" > <span class="keyword_name"> Zero trust </span> </a> </li> </ul> </div> </div> </div> </div> <div class="right_col main_content"> <div class="tip_off_widget"> <h4>TIP US OFF</h4> <p><a href="https://www.theregister.com/Profile/contact/" target="_blank">Send us news</a></p> </div> </div> </div> </div> </article> <hr id=story_section_break> <div id=story-bot-col> <h3 style="position:absolute;color:transparent;z-index:-1;">Other stories you might like</h3> <div id="aua" data-unit-type="aua" class="keepreading"> <div class=headlines> <div class="img_lite_srow img_lite_rt-1b"> <article> <a href="/2024/11/20/equinox_patients_employees_data/?td=keepreading" class=story_link> <div class="article_text_elements"> <h4>Healthcare org Equinox notifies 21K patients and staff of data theft</h4> <div class=standfirst>Ransomware scum LockBit claims it did the dirty deed</div> <div class=time_comments> <span class="section_name">Cyber-crime</span><span class="time_stamp" title="20 Nov 2024 0:30" data-epoch="1732062607">20 Nov 2024</span> | <span class="comment light_bg_comments">1</span></div> </div> </a> </article> <article> <a href="/2024/11/13/china_volt_typhoon_back/?td=keepreading" class=story_link> <div class="article_text_elements"> <h4>China's Volt Typhoon crew and its botnet surge back with a vengeance</h4> <div class=standfirst>Ohm, for flux sake</div> <div class=time_comments> <span class="section_name">Public Sector</span><span class="time_stamp" title="13 Nov 2024 0:58" data-epoch="1731459490">13 Nov 2024</span> | <span class="comment light_bg_comments">4</span></div> </div> </a> </article> <article> <a href="/2024/11/15/palo_alto_networks_firewall_zeroday/?td=keepreading" class=story_link> <div class="article_text_elements"> <h4>Mystery Palo Alto Networks hijack-my-firewall zero-day now officially under exploit</h4> <div class=standfirst>Yank access to management interface, stat</div> <div class=time_comments> <span class="section_name">CSO</span><span class="time_stamp" title="15 Nov 2024 21:7" data-epoch="1731704823">15 Nov 2024</span> | <span class="comment light_bg_comments">28</span></div> </div> </a> </article> <article> <a href="/2024/10/29/why_ai_builds_best_on/?td=keepreading" class=story_link> <div class="article_text_elements"> <h4>Why AI builds best on private clouds</h4> <div class=standfirst>AI projects under pressure to show real value in the tightest of timeframes might be worth keeping on-premises</div> <div class=time_comments><span class="section_name">Sponsored Feature</span></div> </div> </a> </article> </div> <div aria-hidden="true" class="adun" data-pos="btm" data-raptor="hawk" data-xsm=",fluid,mpu," data-sm=",fluid,mpu," data-md=",fluid,mpu," data-xmd=",fluid,leaderboard,mpu," data-lg=",fluid,mpu,leaderboard," data-xlg=",fluid,billboard,superleaderboard,mpu,leaderboard," data-xxlg=",fluid,billboard,superleaderboard,brandwidth,brandimpact,mpu,leaderboard,"> <noscript> <a href="https://pubads.g.doubleclick.net/gampad/jump?co=1&iu=/6978/reg_security/cybercrime&sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&tile=6&c=66Z0Kq3XKFsntpXb-3spyG2QAAAMA&t=ct%3Dns%26unitnum%3D6%26raptor%3Dhawk%26pos%3Dbtm%26test%3D0" target="_blank"> <img src="https://pubads.g.doubleclick.net/gampad/ad?co=1&iu=/6978/reg_security/cybercrime&sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&tile=6&c=66Z0Kq3XKFsntpXb-3spyG2QAAAMA&t=ct%3Dns%26unitnum%3D6%26raptor%3Dhawk%26pos%3Dbtm%26test%3D0" alt=""> </a> </noscript> </div> <div class="img_lite_srow img_lite_rt-1b"> <article> <a href="/2024/11/13/demandscience_data/?td=keepreading" class=story_link> <div class="article_text_elements"> <h4>Data broker amasses 100M+ records on people – then someone snatches, sells it</h4> <div class=standfirst>We call this lead degeneration</div> <div class=time_comments> <span class="section_name">Cyber-crime</span><span class="time_stamp" title="13 Nov 2024 21:44" data-epoch="1731534250">13 Nov 2024</span> | <span class="comment light_bg_comments">18</span></div> </div> </a> </article> <article> <a href="/2024/11/22/palo_alto_firewalls_under_exploit/?td=keepreading" class=story_link> <div class="article_text_elements"> <h4>1000s of Palo Alto Networks firewalls hijacked as miscreants exploit critical hole</h4> <div class=standfirst>PAN-PAN! Intruders inject web shell backdoors, crypto-coin miners, more</div> <div class=time_comments> <span class="section_name">CSO</span><span class="time_stamp" title="22 Nov 2024 21:27" data-epoch="1732310829">22 Nov 2024</span> | <span class="comment light_bg_comments">10</span></div> </div> </a> </article> <article> <a href="/2024/11/18/tmobile_us_attack_salt_typhoon/?td=keepreading" class=story_link> <div class="article_text_elements"> <h4>T-Mobile US 'monitoring' China's 'industry-wide attack' amid fresh security breach fears</h4> <div class=standfirst> <span class="label">updated</span> Un-carrier said to be among those hit by Salt Typhoon, including AT&T, Verizon</div> <div class=time_comments> <span class="section_name">Networks</span><span class="time_stamp" title="18 Nov 2024 20:43" data-epoch="1731962602">18 Nov 2024</span> | <span class="comment light_bg_comments">2</span></div> </div> </a> </article> <article> <a href="/2024/11/14/salt_typhoon_hacked_multiple_telecom/?td=keepreading" class=story_link> <div class="article_text_elements"> <h4>Reminder: China-backed crews compromised 'multiple' US telcos in 'significant cyber espionage campaign'</h4> <div class=standfirst> <span class="label">Updated</span> Feds don't name Salt Typhoon, but describe Beijing band's alleged deeds</div> <div class=time_comments> <span class="section_name">Research</span><span class="time_stamp" title="14 Nov 2024 1:54" data-epoch="1731549251">14 Nov 2024</span> | <span class="comment light_bg_comments">5</span></div> </div> </a> </article> </div> <div class="img_lite_srow img_lite_rt-1b"> <article> <a href="/2024/11/19/china_brazenbamboo_fortinet_0day/?td=keepreading" class=story_link> <div class="article_text_elements"> <h4>China-linked group abuses Fortinet 0-day with post-exploit VPN-credential stealer</h4> <div class=standfirst>No word on when or if the issue will be fixed</div> <div class=time_comments> <span class="section_name">Security</span><span class="time_stamp" title="19 Nov 2024 23:2" data-epoch="1732057333">19 Nov 2024</span> | <span class="comment light_bg_comments">2</span></div> </div> </a> </article> <article> <a href="/2024/11/18/ford_actively_investigating_breach/?td=keepreading" class=story_link> <div class="article_text_elements"> <h4>Ford 'actively investigating' after employee data allegedly parked on leak site</h4> <div class=standfirst> <span class="label">Updated</span> Plus: Maxar Space Systems confirms employee info stolen in digital intrusion</div> <div class=time_comments> <span class="section_name">Security</span><span class="time_stamp" title="18 Nov 2024 23:58" data-epoch="1731974288">18 Nov 2024</span> | <span class="comment light_bg_comments">3</span></div> </div> </a> </article> <article> <a href="/2024/11/18/vmware_vcenter_rce_exploited/?td=keepreading" class=story_link> <div class="article_text_elements"> <h4>Critical 9.8-rated VMware vCenter RCE bug exploited after patch fumble</h4> <div class=standfirst>If you didn't fix this a month ago, your to-do list probably needs a reshuffle</div> <div class=time_comments> <span class="section_name">Virtualization</span><span class="time_stamp" title="18 Nov 2024 22:29" data-epoch="1731968949">18 Nov 2024</span> | <span class="comment light_bg_comments">4</span></div> </div> </a> </article> <article> <a href="/2024/11/17/passkeys_passwords/?td=keepreading" class=story_link> <div class="article_text_elements"> <h4>Will passkeys ever replace passwords? Can they?</h4> <div class=standfirst> <span class="label">Systems Approach</span> Here's why they really should</div> <div class=time_comments> <span class="section_name">Security</span><span class="time_stamp" title="17 Nov 2024 18:30" data-epoch="1731868207">17 Nov 2024</span> | <span class="comment light_bg_comments">116</span></div> </div> </a> </article> </div> </div> <div aria-hidden="true" class="adun" data-pos="btm" data-raptor="owl" data-xsm=",fluid,mpu,dmpu," data-sm=",fluid,mpu,dmpu," data-md=",fluid,mpu,dmpu," data-xmd=",fluid,leaderboard,mpu," data-lg=",fluid,mpu,leaderboard," data-xlg=",fluid,billboard,superleaderboard,mpu,leaderboard," data-xxlg=",fluid,billboard,superleaderboard,brandwidth,brandimpact,mpu,leaderboard,"></div> </div> </div><div id=footer> <div class="footer_slogan"> <div class="footer_wrapper"> <p>The Register <img class="vulture_icon" src="/design_picker/d518b499f8a6e2c65d4d8c49aca8299d54b03012/graphics/icon/vulture_white.png" alt="icon"> Biting the hand that feeds IT</p> </div> </div> <div class="footer_wrapper"> <div class=foot_wrapper> <div class="left_block"> <div class="foot_list"> <h4>About Us<img loading="lazy" width="7" height="11" alt="" src="/design_picker/d2e337b97204af4aa34dda04c4e5d56d954b216f/graphics/icon/footer_mob_nav_arrow_black.svg" class="expand_arrow"></h4> <ul> <li><a href="https://www.theregister.com/Profile/contact/">Contact us</a></li> <li><a target=_blank rel=noopener href="https://www.theregister.com/AdvertiseWithUs/">Advertise with us</a></li> <li><a href="https://www.theregister.com/Profile/about_the_register/">Who we are</a></li> </ul> </div> <div class="foot_list more_us"> <h4>Our Websites<img loading="lazy" width="7" height="11" alt="" src="/design_picker/d2e337b97204af4aa34dda04c4e5d56d954b216f/graphics/icon/footer_mob_nav_arrow_black.svg" class="expand_arrow"></h4> <ul> <li><a href="https://www.nextplatform.com/">The Next Platform</a></li> <li><a href="https://devclass.com/">DevClass</a></li> <li><a href="https://blocksandfiles.com/">Blocks and Files</a></li> </ul> </div> <div class="foot_list privacy"> <h4>Your Privacy<img loading="lazy" width="7" height="11" alt="" src="/design_picker/d2e337b97204af4aa34dda04c4e5d56d954b216f/graphics/icon/footer_mob_nav_arrow_black.svg" class="expand_arrow"></h4> <ul> <li><a href="https://www.theregister.com/Profile/cookies/">Cookies Policy</a></li> <li><a href="https://www.theregister.com/Profile/privacy/">Privacy Policy</a></li> <li><a href="https://www.theregister.com/Profile/terms_and_conditions_of_use/">Ts & Cs</a></li> </ul> </div> </div> <div class="right_block"> <div class="foot_list"> <a href="https://situationpublishing.com/" id="sitpub_logo"> <img loading="lazy" width="250" alt="Situation Publishing" src="/design_picker/d2e337b97204af4aa34dda04c4e5d56d954b216f/graphics/std/sitpublogo_2022.png"> </a> <p> Copyright. All rights reserved © 1998–2024 </p> </div> </div> <noscript><img width="1" height="1" src="/Design/graphics/std/transparent_pixel.png" alt="no-js"></noscript> </div> </div> </div> <div id=end_scripts> <script> if (typeof(ElReg.Ga.sendPageView) === 'function') { ElReg.Ga.sendPageView('reg_security/cybercrime','0df13fad2ea597c71ae99fa84c3f976d','0df13fad2ea597c71ae99fa84c3f976d'); } </script> <script> $(function() { RegUtils.set_bucket_group(39) }); </script> </div> </div> </body> </html>

CINXE.COM

TeamViewer responds to security 'irregularity' in IT network • The Register