AEGLIX vulnerability intelligence
CVE-2014-1776
CRITICAL · CVSS 9.8 · Analyzed
Published: 2014-04-27 · Updated: 2026-06-17 · Source: NVD
Vulnerability overview
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."
Severity and scoring
- CVSS score
- 9.8 · CRITICAL
- CVSS version
- 3.1
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-416
CVSS measures technical severity; it does not establish whether this vulnerability is being exploited in your environment.
Known exploitation and remediation
Listed in CISA’s Known Exploited Vulnerabilities catalog.
- Affected product
- Microsoft · Internet Explorer
- Added to catalog
- 2022-01-28
- Required action
- Apply updates per vendor instructions.
- CISA remediation due date
- 2022-07-28
CISA deadlines apply to the organizations covered by its directives. Confirm your own remediation requirements.
Verify affected versions and patch availability in the vendor advisory before making changes.
Affected products and versions
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:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:10:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:11:-:*:*:*:*:*:*
These are NVD CPE applicability entries. Some products depend on configuration conditions; consult the official record to confirm applicability.
Advisories and 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