CVE-2009-1123

HIGHNVD 7.89.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2022-03-03), 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
7.8
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS: 5%CVSS: 7.8Exploit: NoneExposed: 0

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

The kernel in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP2, Vista Gold, SP1, and SP2, and Server 2008 SP2 does not properly validate changes to unspecified kernel objects, which allows local users to gain privileges via a crafted application, aka "Windows Kernel Desktop Vulnerability."

CVSS v3
7.8
EG Score
9.0(high)
EPSS
91.1%
KEV
⚠ Exploited

Published

June 10, 2009

Last Modified

April 22, 2026

Advisory Details (4)

Auto-updated May 19, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic
http://www.securitytracker.com/id?1022359
generic

About Secunia Research | Flexera

http://secunia.com/advisories/35372
generic🟡 PoC Available

Microsoft Security Bulletin MS09-025 - Important | Microsoft Learn

https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-025
generic

VUPEN Security - Vulnerability Research and Intelligence

http://www.vupen.com/english/advisories/2009/1544

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 102× in last 7d / 444× 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 607 total refreshes for this CVE.

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

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Frequently asked(6)

What is CVE-2009-1123?
CVE-2009-1123 is a high vulnerability published on June 10, 2009. The kernel in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP2, Vista Gold, SP1, and SP2, and Server 2008 SP2 does not properly validate changes to unspecified kernel objects, which allows local users to gain privileges via a crafted application, aka "Windows Kernel Desktop…
When was CVE-2009-1123 disclosed?
CVE-2009-1123 was first published in the National Vulnerability Database on June 10, 2009, 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-2009-1123 actively exploited?
Yes. CISA added CVE-2009-1123 to the Known Exploited Vulnerabilities catalog on March 3, 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-2009-1123?
CVE-2009-1123 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-2009-1123?
CVE-2009-1123 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-2009-1123?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2009-1123, 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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