CVEvulnerability
CVE-2014-1776
CISA Known Exploited Vulnerability
Microsoft Internet Explorer Memory Corruption Vulnerability — Microsoft Internet Explorer
Microsoft Internet Explorer contains a memory corruption vulnerability that allows remote attackers to execute code in the context of the current user.
- Added to KEV
- 2022-01-28
- Remediation due
- 2022-07-28
- Ransomware use
- Unknown
- Required action
- Apply updates per vendor instructions.
- Notes
- https://learn.microsoft.com/en-us/security-updates/SecurityBulletins/2014/ms14-021?redirectedfrom=MSDN; https://nvd.nist.gov/vuln/detail/CVE-2014-1776
- Status
- Analyzed
- Published
- 2014-04-27
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CVSS 2.0 ([email protected])
- 10.0 HIGH — AV:N/AC:L/Au:N/C:C/I:C/A:C
- Weaknesses
- CWE-416
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 configurations
• microsoft internet explorer 6
• microsoft internet explorer 7
• microsoft internet explorer 8
• microsoft internet explorer 9
• microsoft internet explorer 10
• microsoft internet explorer 11
Related
Weakness · CWE (1)
- CWE-416 Use After Free weakness
References
- http://blogs.technet.com/b/srd/archive/2014/04/30/protection-strategies-for-the-security-advisory-2963983-ie-0day.aspx Broken Link, Mitigation
- http://secunia.com/advisories/57908 Broken Link
- http://securitytracker.com/id?1030154 Broken Link, Third Party Advisory, VDB Entry
- http://www.fireeye.com/blog/uncategorized/2014/04/new-zero-day-exploit-targeting-internet-explorer-versions-9-through-11-identified-in-targeted-attacks.html Broken Link
- http://www.kb.cert.org/vuls/id/222929 Mitigation, Third Party Advisory, US Government Resource
- http://www.osvdb.org/106311 Broken Link
- http://www.securityfocus.com/bid/67075 Broken Link, Third Party Advisory, VDB Entry
- http://www.signalsec.com/cve-2014-1776-ie-0day-analysis/ Exploit, Third Party Advisory
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-021 Patch, Vendor Advisory
- https://technet.microsoft.com/library/security/2963983 Mitigation, Patch, Vendor Advisory
- http://blogs.technet.com/b/srd/archive/2014/04/30/protection-strategies-for-the-security-advisory-2963983-ie-0day.aspx Broken Link, Mitigation
- http://secunia.com/advisories/57908 Broken Link
- http://securitytracker.com/id?1030154 Broken Link, Third Party Advisory, VDB Entry
- http://www.fireeye.com/blog/uncategorized/2014/04/new-zero-day-exploit-targeting-internet-explorer-versions-9-through-11-identified-in-targeted-attacks.html Broken Link
- http://www.kb.cert.org/vuls/id/222929 Mitigation, Third Party Advisory, US Government Resource
- http://www.osvdb.org/106311 Broken Link
- http://www.securityfocus.com/bid/67075 Broken Link, Third Party Advisory, VDB Entry
- http://www.signalsec.com/cve-2014-1776-ie-0day-analysis/ Exploit, Third Party Advisory
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-021 Patch, Vendor Advisory
- https://technet.microsoft.com/library/security/2963983 Mitigation, Patch, Vendor Advisory
- https://www.vicarius.io/vsociety/posts/cve-2014-1776-use-after-free-vulnerability-in-microsoft-internet-explorer-detection-script Third Party Advisory
- https://www.vicarius.io/vsociety/posts/cve-2014-1776-use-after-free-vulnerability-in-microsoft-internet-explorer-mitigation-scripts Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2014-1776 US Government Resource