CVE-2011-3402
CVE-2011-3402 is a high-severity vulnerability in Microsoft Windows 7 with a CVSS 3.x base score of 8.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2025-10-06).
Key facts
- Severity: High (CVSS 3.x base score 8.8)
- CVSS v2: 9.3
- EPSS exploit prediction: 78% (100th percentile)
- Actively exploited: Yes — listed in CISA KEV (added 2025-10-06)
- EU (EUVD) id: EUVD-2011-3365
- EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2025-10-06)
- Affected product: Microsoft Windows 7
- Published:
- Last modified:
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."
Frequently asked questions
- What is 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."
- How severe is CVE-2011-3402?
- CVE-2011-3402 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2011-3402 being actively exploited?
- Yes. CVE-2011-3402 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2025-10-06, which means active exploitation has been confirmed. It should be prioritised for remediation.
- What products are affected by CVE-2011-3402?
- CVE-2011-3402 primarily affects Microsoft Windows 7. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2011-3402?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
- Does CVE-2011-3402 have an EU (EUVD) identifier?
- Yes. CVE-2011-3402 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2011-3365. It is also flagged as exploited in the EUVD (since 2025-10-06).
- When was CVE-2011-3402 published?
- CVE-2011-3402 was published on 2011-11-04 and last updated on 2026-06-16.
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
- http://www.us-cert.gov/cas/techalerts/TA12-164A.html
- http://www.us-cert.gov/control_systems/pdf/ICS-ALERT-11-291-01E.pdf
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-087
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-034
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-039
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A13998
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15290
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15645
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2011-3402
Affected products (9)
- cpe:2.3:o:microsoft:windows_7:-:sp1:*:*:*:*:x64:*
- cpe:2.3:o:microsoft:windows_7:-:sp1:*:*:*:*:x86:*
- cpe:2.3:o:microsoft:windows_server_2003:-:sp2:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:x64:*
- cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:x86:*
- cpe:2.3:o:microsoft:windows_vista:-:sp2:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_xp:-:sp2:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_xp:-:sp3:*:*:*:*:*:*
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