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."

Metrics

CVSS 3.1

9.8 (CRITICAL) Score source: CNA CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS — exploit probability

83% (percentile: 100) as of 1 November 2026

CWE

CWE-416

Affected products

microsoft: internet explorer; microsoft: windows server 2003; microsoft: windows xp; microsoft: windows server 2008; microsoft: windows vista; microsoft: windows 7; microsoft: windows 8; microsoft: windows rt; microsoft: windows server 2012; microsoft: windows 8.1; microsoft: windows rt 8.1

References

• https://docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-0… PatchVendor Advisory
• https://technet.microsoft.com/library/security/2963983 MitigationPatchVendor Advisory
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-0… PatchVendor Advisory
• https://technet.microsoft.com/library/security/2963983 MitigationPatchVendor Advisory
• http://www.signalsec.com/cve-2014-1776-ie-0day-analysis/ ExploitThird Party Advisory
• http://www.signalsec.com/cve-2014-1776-ie-0day-analysis/ ExploitThird Party Advisory
• http://blogs.technet.com/b/srd/archive/2014/04/30/protection-strategies-for-the… Broken LinkMitigation
• http://secunia.com/advisories/57908 Broken Link
• http://securitytracker.com/id?1030154 Broken LinkThird Party AdvisoryVDB Entry
• http://www.fireeye.com/blog/uncategorized/2014/04/new-zero-day-exploit-targetin… Broken Link