{"id":"CVE-2014-1776","aliases":["EUVD-2014-1850","GHSA-44fv-7jv8-5cpp"],"status":"published","title":"Use-after-free vulnerability in Microsoft Internet Explorer 6 through 11 allows remote attackers...","description":"Use-after-free vulnerability in Microsoft Internet Explorer 6 through 11 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via vectors related to the CMarkup::IsConnectedToPrimaryMarkup function, as exploited in the wild in April 2014.  NOTE: this issue originally emphasized VGX.DLL, but Microsoft clarified that \"VGX.DLL does not contain the vulnerable code leveraged in this exploit. Disabling VGX.DLL is an exploit-specific workaround that provides an immediate, effective workaround to help block known attacks.\"","severity":{"version":"2.0","score":10,"vector":"AV:N/AC:L/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-07","score":0.82682,"percentile":0.99669,"model":"v2026.06.15"},"facts":{"in_kev":true,"known_exploited":true,"public_exploit":false,"fix_available":false},"cwes":["CWE-416"],"published":"2014-04-27T10:00:00Z","modified":"2026-06-17T00:05:32Z","kev":{"date_added":"2022-01-28","due_date":"2022-07-28","required_action":"Apply updates per vendor instructions.","known_ransomware_use":"Unknown"},"exploitation":[{"source":"euvd","since":"2022-01-28"},{"source":"kev","since":"2022-01-28"}],"products":[{"vendor":"microsoft","product":"internet explorer"},{"vendor":"microsoft","product":"internet_explorer"}],"references":[{"url":"http://securitytracker.com/id?1030154","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred","Broken Link","Third Party Advisory","VDB Entry"]},{"url":"http://www.osvdb.org/106311","tags":["vdb-entry","x_refsource_OSVDB","x_transferred","Broken Link"]},{"url":"https://docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-021","tags":["vendor-advisory","x_refsource_MS","x_transferred","Patch","Vendor Advisory"]},{"url":"http://blogs.technet.com/b/srd/archive/2014/04/30/protection-strategies-for-the-security-advisory-2963983-ie-0day.aspx","tags":["x_refsource_CONFIRM","x_transferred","Broken Link","Mitigation"]},{"url":"http://secunia.com/advisories/57908","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Broken Link"]},{"url":"http://www.signalsec.com/cve-2014-1776-ie-0day-analysis/","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"http://www.fireeye.com/blog/uncategorized/2014/04/new-zero-day-exploit-targeting-internet-explorer-versions-9-through-11-identified-in-targeted-attacks.html","tags":["x_refsource_MISC","x_transferred","Broken Link"]},{"url":"http://www.kb.cert.org/vuls/id/222929","tags":["third-party-advisory","x_refsource_CERT-VN","x_transferred","Mitigation","Third Party Advisory","US Government Resource"]},{"url":"https://technet.microsoft.com/library/security/2963983","tags":["x_refsource_CONFIRM","x_transferred","Mitigation","Patch","Vendor Advisory"]},{"url":"http://www.securityfocus.com/bid/67075","tags":["vdb-entry","x_refsource_BID","x_transferred","Broken Link","Third Party Advisory","VDB Entry"]},{"url":"https://www.vicarius.io/vsociety/posts/cve-2014-1776-use-after-free-vulnerability-in-microsoft-internet-explorer-mitigation-scripts","tags":["Third Party Advisory"]},{"url":"https://www.vicarius.io/vsociety/posts/cve-2014-1776-use-after-free-vulnerability-in-microsoft-internet-explorer-detection-script","tags":["Third Party Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2014-1776","tags":["government-resource","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2014-1776"},{"url":"http://www.signalsec.com/cve-2014-1776-ie-0day-analysis"},{"url":"https://github.com/advisories/GHSA-44fv-7jv8-5cpp"}],"sources":{"cve":[{"id":"CVE-2014-1776","description":"Use-after-free vulnerability in Microsoft Internet Explorer 6 through 11 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via vectors related to the CMarkup::IsConnectedToPrimaryMarkup function, as exploited in the wild in April 2014.  NOTE: this issue originally emphasized VGX.DLL, but Microsoft clarified that \"VGX.DLL does not contain the vulnerable code leveraged in this exploit. Disabling VGX.DLL is an exploit-specific workaround that provides an immediate, effective workaround to help block known attacks.\"","status":"published","published":"2014-04-27T10:00:00Z","modified":"2025-10-22T00:05:37.934Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"adp"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T14:33:45.938615Z"}],"euvd":[{"id":"EUVD-2014-1850","description":"Use-after-free vulnerability in Microsoft Internet Explorer 6 through 11 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via vectors related to the CMarkup::IsConnectedToPrimaryMarkup function, as exploited in the wild in April 2014.  NOTE: this issue originally emphasized VGX.DLL, but Microsoft clarified that \"VGX.DLL does not contain the vulnerable code leveraged in this exploit. Disabling VGX.DLL is an exploit-specific workaround that provides an immediate, effective workaround to help block known attacks.\"","status":"published","published":"2014-04-27T10:00:00Z","modified":"2025-10-22T00:05:37Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"exploited_since":"2022-01-28","updated_at":"2026-11-02T19:49:39.244432Z"}],"ghsa":[{"id":"GHSA-44fv-7jv8-5cpp","title":"Use-after-free vulnerability in Microsoft Internet Explorer 6 through 11 allows remote attackers...","description":"Use-after-free vulnerability in Microsoft Internet Explorer 6 through 11 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via vectors related to the CMarkup::IsConnectedToPrimaryMarkup function, as exploited in the wild in April 2014.  NOTE: this issue originally emphasized VGX.DLL, but Microsoft clarified that \"VGX.DLL does not contain the vulnerable code leveraged in this exploit. Disabling VGX.DLL is an exploit-specific workaround that provides an immediate, effective workaround to help block known attacks.\"","status":"published","published":"2022-05-14T02:32:18Z","modified":"2025-10-22T03:31:43Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T15:04:10.406188Z"}],"kev":[{"id":"CVE-2014-1776","title":"Microsoft Internet Explorer Memory Corruption Vulnerability","description":"Microsoft Internet Explorer contains a memory corruption vulnerability that allows remote attackers to execute code in the context of the current user.","cwes":["CWE-416"],"kev":{"date_added":"2022-01-28","due_date":"2022-07-28","required_action":"Apply updates per vendor instructions.","known_ransomware_use":"Unknown"},"updated_at":"2026-11-02T17:00:16.541131Z"}],"nvd":[{"id":"CVE-2014-1776","description":"Use-after-free vulnerability in Microsoft Internet Explorer 6 through 11 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via vectors related to the CMarkup::IsConnectedToPrimaryMarkup function, as exploited in the wild in April 2014.  NOTE: this issue originally emphasized VGX.DLL, but Microsoft clarified that \"VGX.DLL does not contain the vulnerable code leveraged in this exploit. Disabling VGX.DLL is an exploit-specific workaround that provides an immediate, effective workaround to help block known attacks.\"","status":"published","published":"2014-04-27T10:55:03.34Z","modified":"2026-06-17T00:05:32.593Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"},{"version":"2.0","score":10,"vector":"AV:N/AC:L/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T14:02:54.082915Z"}]}}