Microsoft Windows Remote Code Execution Vulnerability
n/a — n/a
Unspecified vulnerability in the TrueType font parsing engine in win32k.sys in the kernel-mode drivers in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2, R2, and R2 SP1, and Windows 7 Gold and SP1 allows remote attackers to execute arbitrary code via crafted font data in a Word document or web page, as exploited in the wild in November 2011 by Duqu, aka "TrueType Font Parsing Vulnerability."
8.8
78.3%
Vector breakdown
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Published
- Nov 4, 2011
- Modified
- Oct 22, 2025
- Added to KEV
- Oct 6, 2025
- Federal patch due
- Oct 27, 2025
CISA required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Proof-of-concept & exploitation references
Weaponization
Public repositories whose name or description references CVE-2011-3402, found via a live GitHub search at request time. These are community-sourced signals, not a verified working exploit - cross-check each one before relying on it, and treat higher star counts and recent activity as (weak) corroboration, not proof.
No public GitHub repositories referencing CVE-2011-3402 were found at last check. Absence here is not proof no exploit exists - see the references below for vendor advisories and write-ups.
References
- secunia.com
- oval.cisecurity.org
- us-cert.gov
- blogs.mcafee.com
- securitytracker.com
- secunia.com
- docs.microsoft.com
- symantec.com
- us-cert.gov
- oval.cisecurity.org
- us-cert.gov
- securelist.com
- technet.microsoft.com
- docs.microsoft.com
- docs.microsoft.com
- oval.cisecurity.org
- isc.sans.edu
- symantec.com
- us-cert.gov
- blogs.technet.com
Frequently asked questions
What is CVE-2011-3402?
Unspecified vulnerability in the TrueType font parsing engine in win32k.sys in the kernel-mode drivers in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2, R2, and R2 SP1, and Windows 7 Gold and SP1 allows remote attackers to execute arbitrary code via crafted font data in a Word document or web page, as exploited in the wild in November 2011 by Duqu, aka "TrueType Font Parsing Vulnerability."
How severe is CVE-2011-3402?
CVE-2011-3402 has a CVSS base score of 8.8 out of 10 (CVSS 3.1).
Is CVE-2011-3402 actively exploited in the wild?
Yes. CVE-2011-3402 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added Oct 6, 2025, meaning CISA has confirmed evidence of active exploitation.
What is the EPSS score for CVE-2011-3402?
78.3% - meaning FIRST.org's EPSS model estimates a 78.3% probability this vulnerability will be exploited in the wild within 30 days (100% percentile among all scored CVEs).
Cross-checked against
Impactr finds and proves whether CVE-2011-3402 - or flaws like it - are actually reachable in your own web apps and APIs, with a reproducible exploit as evidence.
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