CVE-2011-3402

HIGHNVD 8.89.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2025-10-06), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 8.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 4 sources updated this weekExploited in the wild
8.8
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS: 78%CVSS: 8.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
8.8
EG Score
9.0(high)
EPSS
99.5%
KEV
⚠ Exploited

Published

November 4, 2011

Last Modified

April 22, 2026

Advisory Details (4)

Auto-updated May 2, 2026
No patch confirmed yet.
generic

About Secunia Research | Flexera

http://secunia.com/advisories/49122
generic

About Secunia Research | Flexera

http://secunia.com/advisories/49121
generic

Duqu Mitigation - SANS Internet Storm Center

http://isc.sans.edu/diary/Duqu+Mitigation/11950
generic

Archived MSDN and TechNet Blogs | Microsoft Learn

http://blogs.technet.com/b/msrc/archive/2011/11/03/microsoft-releases-security-advisory-2639658.aspx

Data Freshness Timeline

(refreshed 89× in last 7d / 385× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 520 total refreshes for this CVE.

  1. 2026-07-07 19:01 UTCCISA KEV update
  2. 2026-07-07 17:16 UTCCISA KEV update
  3. 2026-07-07 16:38 UTCEG score recompute
  4. 2026-07-07 16:38 UTCGHSA enrichment
  5. 2026-07-07 12:32 UTCEG score recompute
  6. 2026-07-07 12:32 UTCGHSA enrichment
  7. 2026-07-07 08:27 UTCEG score recompute
  8. 2026-07-07 08:27 UTCGHSA enrichment
  9. 2026-07-07 04:20 UTCEG score recompute
  10. 2026-07-07 04:19 UTCGHSA enrichment
  11. 2026-07-07 00:13 UTCEG score recompute
  12. 2026-07-07 00:12 UTCGHSA enrichment
  13. 2026-07-06 20:07 UTCEG score recompute
  14. 2026-07-06 20:07 UTCGHSA enrichment
  15. 2026-07-06 16:23 UTCEPSS rescore
  16. 2026-07-06 16:01 UTCEG score recompute
  17. 2026-07-06 16:01 UTCGHSA enrichment
  18. 2026-07-06 11:55 UTCEG score recompute
  19. 2026-07-06 11:54 UTCGHSA enrichment
  20. 2026-07-06 07:47 UTCEG score recompute
  21. 2026-07-06 07:46 UTCGHSA enrichment
  22. 2026-07-06 03:41 UTCEG score recompute
  23. 2026-07-06 03:41 UTCGHSA enrichment
  24. 2026-07-05 23:37 UTCEG score recompute
  25. 2026-07-05 23:37 UTCGHSA enrichment
Show 75 more
  1. 2026-07-05 19:33 UTCEG score recompute
  2. 2026-07-05 19:33 UTCGHSA enrichment
  3. 2026-07-05 15:29 UTCEG score recompute
  4. 2026-07-05 15:28 UTCGHSA enrichment
  5. 2026-07-05 11:22 UTCEG score recompute
  6. 2026-07-05 11:22 UTCGHSA enrichment
  7. 2026-07-05 07:18 UTCEG score recompute
  8. 2026-07-05 07:17 UTCGHSA enrichment
  9. 2026-07-05 03:12 UTCEG score recompute
  10. 2026-07-05 03:12 UTCGHSA enrichment
  11. 2026-07-04 23:07 UTCEG score recompute
  12. 2026-07-04 23:07 UTCGHSA enrichment
  13. 2026-07-04 19:03 UTCEG score recompute
  14. 2026-07-04 19:03 UTCGHSA enrichment
  15. 2026-07-04 14:58 UTCEG score recompute
  16. 2026-07-04 14:58 UTCGHSA enrichment
  17. 2026-07-04 10:53 UTCEG score recompute
  18. 2026-07-04 10:53 UTCGHSA enrichment
  19. 2026-07-04 06:48 UTCEG score recompute
  20. 2026-07-04 06:48 UTCGHSA enrichment
  21. 2026-07-04 02:42 UTCEG score recompute
  22. 2026-07-04 02:42 UTCGHSA enrichment
  23. 2026-07-03 22:37 UTCEG score recompute
  24. 2026-07-03 22:37 UTCGHSA enrichment
  25. 2026-07-03 18:33 UTCEG score recompute
  26. 2026-07-03 18:33 UTCGHSA enrichment
  27. 2026-07-03 14:29 UTCEG score recompute
  28. 2026-07-03 14:29 UTCGHSA enrichment
  29. 2026-07-03 10:25 UTCEG score recompute
  30. 2026-07-03 10:25 UTCGHSA enrichment
  31. 2026-07-03 06:18 UTCEG score recompute
  32. 2026-07-03 06:18 UTCGHSA enrichment
  33. 2026-07-03 02:12 UTCEG score recompute
  34. 2026-07-03 02:12 UTCGHSA enrichment
  35. 2026-07-02 22:08 UTCEG score recompute
  36. 2026-07-02 22:08 UTCGHSA enrichment
  37. 2026-07-02 18:04 UTCEG score recompute
  38. 2026-07-02 18:04 UTCGHSA enrichment
  39. 2026-07-02 14:01 UTCEPSS rescore
  40. 2026-07-02 14:00 UTCEG score recompute
  41. 2026-07-02 14:00 UTCGHSA enrichment
  42. 2026-07-02 09:55 UTCEG score recompute
  43. 2026-07-02 09:55 UTCGHSA enrichment
  44. 2026-07-02 05:50 UTCEG score recompute
  45. 2026-07-02 05:50 UTCGHSA enrichment
  46. 2026-07-02 01:45 UTCEG score recompute
  47. 2026-07-02 01:45 UTCGHSA enrichment
  48. 2026-07-01 21:41 UTCEG score recompute
  49. 2026-07-01 21:41 UTCGHSA enrichment
  50. 2026-07-01 19:16 UTCCISA KEV update
  51. 2026-07-01 17:36 UTCEG score recompute
  52. 2026-07-01 17:36 UTCGHSA enrichment
  53. 2026-07-01 13:32 UTCEG score recompute
  54. 2026-07-01 13:32 UTCGHSA enrichment
  55. 2026-07-01 09:28 UTCEG score recompute
  56. 2026-07-01 09:28 UTCGHSA enrichment
  57. 2026-07-01 05:23 UTCEG score recompute
  58. 2026-07-01 05:23 UTCGHSA enrichment
  59. 2026-07-01 01:17 UTCEG score recompute
  60. 2026-07-01 01:17 UTCGHSA enrichment
  61. 2026-06-30 23:19 UTCEPSS rescore
  62. 2026-06-30 23:19 UTCEPSS rescore
  63. 2026-06-30 21:13 UTCEG score recompute
  64. 2026-06-30 21:13 UTCGHSA enrichment
  65. 2026-06-30 17:07 UTCEG score recompute
  66. 2026-06-30 17:06 UTCGHSA enrichment
  67. 2026-06-30 12:59 UTCEG score recompute
  68. 2026-06-30 12:59 UTCGHSA enrichment
  69. 2026-06-30 08:55 UTCEG score recompute
  70. 2026-06-30 08:55 UTCGHSA enrichment
  71. 2026-06-30 04:50 UTCEG score recompute
  72. 2026-06-30 04:50 UTCGHSA enrichment
  73. 2026-06-30 00:29 UTCEG score recompute
  74. 2026-06-30 00:29 UTCGHSA enrichment
  75. 2026-06-29 20:25 UTCEG score recompute

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Metasploit module). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Metasploitpost/windows/gather/forensics/duqu_check✓ verified
    First seen Jan 1, 2011

    Windows Gather Forensics Duqu Registry Check

    Open source ↗

Frequently asked(6)

What is CVE-2011-3402?
CVE-2011-3402 is a high vulnerability published on November 4, 2011. 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…
When was CVE-2011-3402 disclosed?
CVE-2011-3402 was first published in the National Vulnerability Database on November 4, 2011, with the most recent update on April 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2011-3402 actively exploited?
Yes. CISA added CVE-2011-3402 to the Known Exploited Vulnerabilities catalog on October 6, 2025, affecting Microsoft Windows. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2011-3402?
CVE-2011-3402 has a CVSS v3 base score of 8.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2011-3402?
CVE-2011-3402 affects Microsoft Windows. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2011-3402?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2011-3402, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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