CVE-2011-3402

CRITICALNVD 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
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 78%CVSS: 8.8Exploit: cisa kev · ssvc active · Metasploit · epss top5pct · epss high · public exploitExposed: 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)
EG Risk
81(Attend)
EG Risk 81/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity90% × 45%
Exploitation100% × 40%
Automatability0% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
78%
EPSS %ILE
100%
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 51× in last 7d / 212× 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 646 total refreshes for this CVE.

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

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 critical 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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