Microsoft Windows Remote Code Execution Vulnerability

ÉLEVÉE 8.8EXPLOITED (CISA KEV)CVE-2011-3402 · Published 04/11/2011 · updated 16/06/2026

Microsoft Windows Remote Code Execution Vulnerability. Actively exploited: CISA added this vulnerability to its Known Exploited Vulnerabilities catalog on 06/10/2025. Patch affected systems as an emergency.

Package	Affected versions	Patched versions
Windows Microsoft	Versions not published yet (product named by CISA KEV)

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."

References

blogs.mcafee.com/mcafee-labs/the-day-of-the-golden-jackal-%E2%80%93-further-tales-of-the-stuxnet-files · Broken Link
blogs.technet.com/b/msrc/archive/2011/11/03/microsoft-releases-security-advisory-2639658.aspx · Vendor Advisory
isc.sans.edu/diary/Duqu+Mitigation/11950 · Third Party Advisory
secunia.com/advisories/49121 · Vendor Advisory
secunia.com/advisories/49122 · Vendor Advisory
technet.microsoft.com/security/advisory/2639658 · Vendor Advisory
securelist.com/en/blog/208193197/The_Mystery_of_Duqu_Part_Two · Not Applicable
securitytracker.com/id · Broken Link
symantec.com/connect/w32-duqu_status-updates_installer-zero-day-exploit · Not Applicable
symantec.com/content/en/us/enterprise/media/security_response/whitepapers/w32_duqu_the_precursor_to_the_next_stuxnet.pdf · Not Applicable
us-cert.gov/cas/techalerts/TA11-347A.html · US Government Resource
us-cert.gov/cas/techalerts/TA12-129A.html · US Government Resource
us-cert.gov/cas/techalerts/TA12-164A.html · US Government Resource
us-cert.gov/control_systems/pdf/ICS-ALERT-11-291-01E.pdf · US Government Resource
docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-087 · Vendor Advisory
docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-034 · Vendor Advisory
docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-039 · Vendor Advisory
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A13998 · Broken Link
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15290 · Broken Link
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15645 · Broken Link
cisa.gov/known-exploited-vulnerabilities-catalog · US Government Resource
CISA KEV · CVE-2011-3402

Running one of these products? Scan your site to see whether it exposes a vulnerable version.

Scan my site free