# CVE-2011-3402

## Summary

- **CVE ID:** CVE-2011-3402
- **Severity:** HIGH
- **CVSS Score:** 8.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
- **CWE:** N/A
- **Published:** Nov 4, 2011
- **Last Modified:** Sep 16, 2026

## Description

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."

## Affected Products

- n/a — n/a (n/a)

## References

- [CNA](http://secunia.com/advisories/49121)
- [CNA](https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15645)
- [CNA](http://www.us-cert.gov/cas/techalerts/TA12-164A.html)
- [CNA](http://blogs.mcafee.com/mcafee-labs/the-day-of-the-golden-jackal-%E2%80%93-further-tales-of-the-stuxnet-files)
- [CNA](http://www.securitytracker.com/id?1027039)
- [CNA](http://secunia.com/advisories/49122)
- [CNA](https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-087)
- [CNA](http://www.symantec.com/content/en/us/enterprise/media/security_response/whitepapers/w32_duqu_the_precursor_to_the_next_stuxnet.pdf)
- [CNA](http://www.us-cert.gov/cas/techalerts/TA11-347A.html)
- [CNA](https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A13998)
- [CNA](http://www.us-cert.gov/control_systems/pdf/ICS-ALERT-11-291-01E.pdf)
- [CNA](http://www.securelist.com/en/blog/208193197/The_Mystery_of_Duqu_Part_Two)
- [CNA](http://technet.microsoft.com/security/advisory/2639658)
- [CNA](https://docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-034)
- [CNA](https://docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-039)
- [CNA](https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15290)
- [CNA](http://isc.sans.edu/diary/Duqu+Mitigation/11950)
- [CNA](http://www.symantec.com/connect/w32-duqu_status-updates_installer-zero-day-exploit)
- [CNA](http://www.us-cert.gov/cas/techalerts/TA12-129A.html)
- [CNA](http://blogs.technet.com/b/msrc/archive/2011/11/03/microsoft-releases-security-advisory-2639658.aspx)
- [CISA-ADP](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2011-3402)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 89.22%
- **EPSS Percentile:** 99.5

## Known Exploited Vulnerabilities (KEV)

- **Date Added:** Oct 6, 2025
- **Due Date:** Oct 27, 2025

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._