CVE-2011-3402Unspecified 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…
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It affects microsoft windows_7 and 4 other products. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Oct 6, 2025; federal agencies had to remediate by Oct 27, 2025. Treat that date as your deadline.
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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."
- CVSS
- 8.8 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Added to CISA KEV Oct 6, 2025; federal remediation due Oct 27, 2025Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- EPSS (exploitation in the next 30 days)
- 78.14% (percentile 100)
- Assigned by
- microsoft
- NVD analysis
- Analyzed
- Record last updated
- Oct 22, 2025
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
microsoft windows_7 microsoft:windows_7 | all versions; all versions | NVD |
microsoft windows_server_2003 microsoft:windows_server_2003 | all versions | NVD |
microsoft windows_server_2008 microsoft:windows_server_2008 | all versions; all versions; all versions | NVD |
microsoft windows_vista microsoft:windows_vista | all versions | NVD |
microsoft windows_xp microsoft:windows_xp | all versions; all versions | NVD |
References
- http://secunia.com/advisories/49121third-party-advisory, x-refsource-secunia, vendor-advisory
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15645vdb-entry, signature, x-refsource-oval, broken-link
- http://www.us-cert.gov/cas/techalerts/TA12-164A.htmlthird-party-advisory, x-refsource-cert, us-government-resource
- http://blogs.mcafee.com/mcafee-labs/the-day-of-the-golden-jackal-%E2%80%93-further-tales-of-the-stuxnet-filesx-refsource-misc, broken-link
- http://www.securitytracker.com/id?1027039vdb-entry, x-refsource-sectrack, broken-link
- http://secunia.com/advisories/49122third-party-advisory, x-refsource-secunia, vendor-advisory
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-087vendor-advisory, x-refsource-ms
- http://www.symantec.com/content/en/us/enterprise/media/security_response/whitepapers/w32_duqu_the_precursor_to_the_next_stuxnet.pdfx-refsource-misc, not-applicable
- http://www.us-cert.gov/cas/techalerts/TA11-347A.htmlthird-party-advisory, x-refsource-cert, us-government-resource
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A13998vdb-entry, signature, x-refsource-oval, broken-link
- http://www.us-cert.gov/control_systems/pdf/ICS-ALERT-11-291-01E.pdfx-refsource-misc, us-government-resource
- http://www.securelist.com/en/blog/208193197/The_Mystery_of_Duqu_Part_Twox-refsource-misc, not-applicable
- http://technet.microsoft.com/security/advisory/2639658x-refsource-confirm, vendor-advisory
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-034vendor-advisory, x-refsource-ms
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-039vendor-advisory, x-refsource-ms
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15290vdb-entry, signature, x-refsource-oval, broken-link
- http://isc.sans.edu/diary/Duqu+Mitigation/11950x-refsource-misc, third-party-advisory
- http://www.symantec.com/connect/w32-duqu_status-updates_installer-zero-day-exploitx-refsource-misc, not-applicable
- http://www.us-cert.gov/cas/techalerts/TA12-129A.htmlthird-party-advisory, x-refsource-cert, us-government-resource
- http://blogs.technet.com/b/msrc/archive/2011/11/03/microsoft-releases-security-advisory-2639658.aspxx-refsource-confirm, vendor-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2011-3402us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.