{"id":"CVE-2014-1776","aliases":[],"url":"https://o3.security/vulnerability/CVE-2014-1776","summary":"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…","details":"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.\"","published":"2014-04-27T10:00:00.000Z","modified":"2025-10-22T00:05:37.934Z","cvss":{"score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":{"score":0.88013,"percentile":0.99751,"asOf":"2026-08-24"},"cisaKev":{"dateAdded":"2022-01-28","dueDate":"2022-07-28","knownRansomwareCampaignUse":false},"exploitsKnown":3,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"http://securitytracker.com/id?1030154"},{"type":"WEB","url":"http://www.osvdb.org/106311"},{"type":"ADVISORY","url":"https://docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-021"},{"type":"WEB","url":"http://blogs.technet.com/b/srd/archive/2014/04/30/protection-strategies-for-the-security-advisory-2963983-ie-0day.aspx"},{"type":"ADVISORY","url":"http://secunia.com/advisories/57908"},{"type":"WEB","url":"http://www.signalsec.com/cve-2014-1776-ie-0day-analysis/"},{"type":"WEB","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"},{"type":"ADVISORY","url":"http://www.kb.cert.org/vuls/id/222929"},{"type":"WEB","url":"https://technet.microsoft.com/library/security/2963983"},{"type":"WEB","url":"http://www.securityfocus.com/bid/67075"},{"type":"WEB","url":"https://www.vicarius.io/vsociety/posts/cve-2014-1776-use-after-free-vulnerability-in-microsoft-internet-explorer-mitigation-scripts"},{"type":"WEB","url":"https://www.vicarius.io/vsociety/posts/cve-2014-1776-use-after-free-vulnerability-in-microsoft-internet-explorer-detection-script"},{"type":"WEB","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2014-1776"}],"provenance":{"sources":["OSV.dev","NVD","CISA KEV","FIRST.org (EPSS)"],"lastVerified":"2025-10-22T00:05:37.934Z"}}