CVE-2010-4398

CRITICALNVD 7.89.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2022-03-28), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 7.8 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: 9%CVSS: 7.8Exploit: cisa kev · ssvc active · Exploit-DB (verified) · public exploitExposed: 0

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

Stack-based buffer overflow in the RtlQueryRegistryValues function in win32k.sys in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP1 and SP2, Windows Server 2008 Gold, SP2, and R2, and Windows 7 allows local users to gain privileges, and bypass the User Account Control (UAC) feature, via a crafted REG_BINARY value for a SystemDefaultEUDCFont registry key, aka "Driver Improper Interaction with Windows Kernel Vulnerability."

CVSS v3
7.8
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
9%
EPSS %ILE
95%
KEV
⚠ Exploited

Published

December 6, 2010

Last Modified

April 21, 2026

Advisory Details (6)

Auto-updated May 19, 2026
🔬 Proof of concept available. No patch confirmed yet. Sources: cert.
generic
http://www.securitytracker.com/id?1025046
generic
http://www.securityfocus.com/bid/45045
cert

VU#529673 - Microsoft Windows RtlQueryRegistryValues() does not adequately validate registry data

http://www.kb.cert.org/vuls/id/529673
generic🟡 PoC Available

Microsoft Windows Vista/7 - Local Privilege Escalation (UAC Bypass) - Windows local Exploit

http://www.exploit-db.com/exploits/15609/
generic

About Secunia Research | Flexera

http://secunia.com/advisories/42356
generic🟡 PoC Available

Privilege escalation 0-day in almost all Windows versions

http://isc.sans.edu/diary.html?storyid=9988

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 38× in last 7d / 200× 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 443 total refreshes for this CVE.

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

Publicly available exploits

(1 reference)

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

  • Exploit-DBEDB-15609✓ verified
    First seen Nov 24, 2010

    Microsoft Windows Vista/7 - Local Privilege Escalation (UAC Bypass)

    Open source ↗

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2010-4398?
CVE-2010-4398 is a critical vulnerability published on December 6, 2010. Stack-based buffer overflow in the RtlQueryRegistryValues function in win32k.sys in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP1 and SP2, Windows Server 2008 Gold, SP2, and R2, and Windows 7 allows local users to gain privileges, and bypass the User Account Control…
When was CVE-2010-4398 disclosed?
CVE-2010-4398 was first published in the National Vulnerability Database on December 6, 2010, with the most recent update on April 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2010-4398 actively exploited?
Yes. CISA added CVE-2010-4398 to the Known Exploited Vulnerabilities catalog on March 28, 2022, affecting Microsoft Windows. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2010-4398?
CVE-2010-4398 has a CVSS v3 base score of 7.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2010-4398?
CVE-2010-4398 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-2010-4398?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2010-4398, 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.

Dependency Blast Radius

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