Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2014-1776

CVE-2014-1776CRITICAL

n/a n/a — Microsoft Internet Explorer

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  H  H  H    9.8   .8268   99.7   YES

AFFECTED
  Product  Versions  Fixed
  n/a      n/a –     —

TIMELINE
  Jan 29  Reserved by microsoft
  Apr 27  Published (CNA: microsoft)
  Jan 28  Added to CISA KEV, remediation due 2022-07-28

CWE-416 · CNA: microsoft · CVSS v3.1 · 13 references · KEV due July 28, 2022

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."

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
January 29, 2014	Reserved	Reserved by microsoft
April 27, 2014	Published	Published (CNA: microsoft)
January 28, 2022	KEV ADDED	Added to CISA KEV, remediation due 2022-07-28

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
n/a	n/a	—	n/a	—

Weaknesses

CWE-416

References (13)

http://blogs.technet.com/b/srd/archive/2014/04/30/protection-strategies-for-the-security-advisory-2963983-ie-0day.aspx [x_refsource_CONFIRM]
http://secunia.com/advisories/57908 [third-party-advisory, x_refsource_SECUNIA]
http://securitytracker.com/id?1030154 [vdb-entry, x_refsource_SECTRACK]
http://www.fireeye.com/blog/uncategorized/2014/04/new-zero-day-exploit-targeting-internet-explorer-versions-9-through-11-identified-in-targeted-attacks.html [x_refsource_MISC]
http://www.kb.cert.org/vuls/id/222929 [third-party-advisory, x_refsource_CERT-VN]
http://www.osvdb.org/106311 [vdb-entry, x_refsource_OSVDB]
http://www.securityfocus.com/bid/67075 [vdb-entry, x_refsource_BID]
http://www.signalsec.com/cve-2014-1776-ie-0day-analysis/ [x_refsource_MISC]
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-021 [vendor-advisory, x_refsource_MS]
https://technet.microsoft.com/library/security/2963983 [x_refsource_CONFIRM]
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2014-1776 [government-resource]
https://www.vicarius.io/vsociety/posts/cve-2014-1776-use-after-free-vulnerability-in-microsoft-internet-explorer-detection-script
https://www.vicarius.io/vsociety/posts/cve-2014-1776-use-after-free-vulnerability-in-microsoft-internet-explorer-mitigation-scripts

Authoritative record: CVE-2014-1776 at cve.org

Weaknesses: CWE-416

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2014-1776 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.