Vulnerability in Microsoft Windows 7
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."
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.781 (99.6th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 100th percentile — 99.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.781 · newest: 0.781 · change: 0.000
Affected products
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
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.
Public proof-of-concept exploits
References
- secunia.com/advisories/49121 (Vendor Advisory, third-party-advisory)
- oval.cisecurity.org/repository/search/definition/oval:org.mitre.oval:def:15645 (Broken Link, signature, vdb-entry)
- www.us-cert.gov/cas/techalerts/TA12-164A.html (US Government Resource, third-party-advisory)
- blogs.mcafee.com/mcafee-labs/the-day-of-the-golden-jackal-–-further-tales-of-th… (Broken Link)
- www.securitytracker.com/id (vdb-entry, Broken Link)
- secunia.com/advisories/49122 (Vendor Advisory, third-party-advisory)
- docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-087 (vendor-advisory, Vendor Advisory)
- www.symantec.com/content/en/us/enterprise/media/security_response/whitepapers/w… (Not Applicable)
- www.us-cert.gov/cas/techalerts/TA11-347A.html (US Government Resource, third-party-advisory)
- oval.cisecurity.org/repository/search/definition/oval:org.mitre.oval:def:13998 (Broken Link, signature, vdb-entry)
Frequently asked questions
- What is CVE-2011-3402?
- CVE-2011-3402 is a high-severity vulnerability in Microsoft Windows 7. CVSS score: 8.8/10. Published 2011-11-04.
- How severe is CVE-2011-3402?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2011-3402 known to be exploited?
- Yes. CVE-2011-3402 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-10-06), indicating it is being actively exploited. 3 public proof-of-concept repositories are indexed.