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CVE-2011-3402: Microsoft Windows Remote Code Execution Vulnerability

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2025-10-06
• EPSS: 78.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2011-11-04 · updated 2026-06-16

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

• Microsoft Windows 7: all versions
• Microsoft Windows Server 2003: all versions
• Microsoft Windows Server 2008: all versions
• Microsoft Windows Vista: all versions
• Microsoft Windows XP Service Pack 3: all versions

References

• http://blogs.mcafee.com/mcafee-labs/the-day-of-the-golden-jackal-%E2%80%93-further-tales-of-the-stuxnet-files
• http://blogs.technet.com/b/msrc/archive/2011/11/03/microsoft-releases-security-advisory-2639658.aspx
• http://isc.sans.edu/diary/Duqu+Mitigation/11950
• http://secunia.com/advisories/49121
• http://secunia.com/advisories/49122
• http://technet.microsoft.com/security/advisory/2639658
• http://www.securelist.com/en/blog/208193197/The_Mystery_of_Duqu_Part_Two
• http://www.securitytracker.com/id?1027039
• http://www.symantec.com/connect/w32-duqu_status-updates_installer-zero-day-exploit
• http://www.symantec.com/content/en/us/enterprise/media/security_response/whitepapers/w32_duqu_the_precursor_to_the_next_stuxnet.pdf
• http://www.us-cert.gov/cas/techalerts/TA11-347A.html
• http://www.us-cert.gov/cas/techalerts/TA12-129A.html

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