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CVE-2014-1776

Known Exploited (CISA KEV)CRITICAL

9.8

CVSS Severity Score

EPSS Score52.8630%

EPSS Percentile85.61th

PublishedApr 27, 2014

Last ModifiedApr 21, 2026

Vulnerability 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."

Affected Platforms (CPE)

📦

Microsoft

Internet Explorer

= 6

📦

Microsoft

Internet Explorer

= 7

📦

Microsoft

Internet Explorer

= 8

📦

Microsoft

Internet Explorer

= 9

📦

Microsoft

Internet Explorer

= 10

📦

Microsoft

Internet Explorer

= 11

References & Advisories

🔗 http://blogs.technet.com/b/srd/archive/2014/04/30/protection-strategies-for-the-security-advisory-2963983-ie-0day.aspx

🔗 http://secunia.com/advisories/57908

🔗 http://securitytracker.com/id?1030154

🔗 http://www.fireeye.com/blog/uncategorized/2014/04/new-zero-day-exploit-targeting-internet-explorer-versions-9-through-11-identified-in-targeted-attacks.html

🔗 http://www.kb.cert.org/vuls/id/222929

🔗 http://www.osvdb.org/106311

🔗 http://www.securityfocus.com/bid/67075

🔗 http://www.signalsec.com/cve-2014-1776-ie-0day-analysis/

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