Critical severity9.8CISA KEVNVD Advisory· Published Apr 27, 2014· Updated Jun 17, 2026
CVE-2014-1776
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."
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
7cpe:2.3:a:microsoft:internet_explorer:10:*:*:*:*:*:*:*+ 6 more
- cpe:2.3:a:microsoft:internet_explorer:10:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:internet_explorer:11:-:*:*:*:*:*:*
- cpe:2.3:a:microsoft:internet_explorer:6:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:internet_explorer:7:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:internet_explorer:8:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:internet_explorer:9:*:*:*:*:*:*:*
- (no CPE)range: 6 through 11
Patches
Vulnerability mechanics
References
13- docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-021nvdPatchVendor Advisory
- technet.microsoft.com/library/security/2963983nvdMitigationPatchVendor Advisory
- www.signalsec.com/cve-2014-1776-ie-0day-analysis/nvdExploitThird Party Advisory
- securitytracker.com/idnvdBroken LinkThird Party AdvisoryVDB Entry
- www.kb.cert.org/vuls/id/222929nvdMitigationThird Party AdvisoryUS Government Resource
- www.securityfocus.com/bid/67075nvdBroken LinkThird Party AdvisoryVDB Entry
- www.vicarius.io/vsociety/posts/cve-2014-1776-use-after-free-vulnerability-in-microsoft-internet-explorer-detection-scriptnvdThird Party Advisory
- www.vicarius.io/vsociety/posts/cve-2014-1776-use-after-free-vulnerability-in-microsoft-internet-explorer-mitigation-scriptsnvdThird Party Advisory
- blogs.technet.com/b/srd/archive/2014/04/30/protection-strategies-for-the-security-advisory-2963983-ie-0day.aspxnvdBroken LinkMitigation
- secunia.com/advisories/57908nvdBroken Link
- www.fireeye.com/blog/uncategorized/2014/04/new-zero-day-exploit-targeting-internet-explorer-versions-9-through-11-identified-in-targeted-attacks.htmlnvdBroken Link
- www.osvdb.org/106311nvdBroken Link
- www.cisa.gov/known-exploited-vulnerabilities-catalognvdUS Government Resource
News mentions
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