CVE-2014-1776

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."

CVSS v3.1 CNA

9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v2.0 NVD

10.0 HIGHAV:N/AC:L/Au:N/C:C/I:C/A:C

EPSS

82.68% chance of exploitation in the next 30 days, 100th percentile

CISA KEV

added 2022-01-28

Published

2014-04-27

Updated

2025-10-22

Proof-of-concept exploits (3)

• http://www.signalsec.com/cve-2014-1776-ie-0day-analysis/
• http://www.fireeye.com/blog/uncategorized/2014/04/new-zero-day-exploit-targeting-internet…
• zha0/Maltego1★ · 2014-05-13

Security advisories

• https://docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-021
• https://technet.microsoft.com/library/security/2963983
• http://securitytracker.com/id?1030154
• http://www.kb.cert.org/vuls/id/222929
• http://www.securityfocus.com/bid/67075
• http://www.signalsec.com/cve-2014-1776-ie-0day-analysis
• https://www.vicarius.io/vsociety/posts/cve-2014-1776-use-after-free-vulnerability-in-micr…
• https://www.vicarius.io/vsociety/posts/cve-2014-1776-use-after-free-vulnerability-in-micr…
• http://blogs.technet.com/b/srd/archive/2014/04/30/protection-strategies-for-the-security-…

References

• CVE Record
• NVD entry

Related

• CVE-2021-1675
• CVE-2023-36407