CVE-2009-2494

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: HIGH) published 2022-05-02. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 42%CVSS: 9.8Exploit: NoneExposed: 0

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

The Active Template Library (ATL) in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP2, Vista Gold, SP1, and SP2, and Server 2008 Gold and SP2 allows remote attackers to execute arbitrary code via vectors related to erroneous free operations after reading a variant from a stream and deleting this variant, aka "ATL Object Type Mismatch Vulnerability."

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
98.5%
KEV
Not listed

Published

August 12, 2009

Last Modified

April 23, 2026

Advisory Details (4)

Auto-updated May 11, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

Microsoft Security Bulletin MS09-037 - Critical | Microsoft Learn

https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-037
generic

VUPEN Security - Vulnerability Research and Intelligence

http://www.vupen.com/english/advisories/2009/2232
generic
http://www.securityfocus.com/bid/35982
generic

About Secunia Research | Flexera

http://secunia.com/advisories/36187

Data Freshness Timeline

(refreshed 4× in last 7d / 28× 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.

  1. 2026-07-06 02:19 UTCEPSS rescore
  2. 2026-07-06 02:19 UTCEPSS rescore
  3. 2026-07-04 06:27 UTCEPSS rescore
  4. 2026-07-01 15:02 UTCEPSS rescore
  5. 2026-06-28 04:52 UTCEPSS rescore
  6. 2026-06-28 04:52 UTCEPSS rescore
  7. 2026-06-27 03:05 UTCEPSS rescore
  8. 2026-06-25 13:46 UTCEPSS rescore
  9. 2026-06-25 13:46 UTCEPSS rescore
  10. 2026-06-23 21:29 UTCEPSS rescore
  11. 2026-06-23 21:29 UTCEPSS rescore
  12. 2026-06-21 01:56 UTCEPSS rescore
  13. 2026-06-21 01:56 UTCEPSS rescore
  14. 2026-06-18 17:49 UTCEPSS rescore
  15. 2026-06-18 17:49 UTCEPSS rescore
  16. 2026-06-17 17:49 UTCEPSS rescore
  17. 2026-06-17 17:49 UTCEPSS rescore
  18. 2026-06-16 17:49 UTCEPSS rescore
  19. 2026-06-16 17:49 UTCEPSS rescore
  20. 2026-06-15 17:44 UTCEPSS rescore
  21. 2026-06-14 23:14 UTCEPSS rescore
  22. 2026-06-14 23:14 UTCEPSS rescore
  23. 2026-06-13 22:57 UTCEPSS rescore
  24. 2026-06-12 23:08 UTCEPSS rescore
  25. 2026-06-12 23:08 UTCEPSS rescore
Show 45 more
  1. 2026-06-10 22:14 UTCEPSS rescore
  2. 2026-06-10 13:17 UTCEPSS rescore
  3. 2026-06-08 14:13 UTCEPSS rescore
  4. 2026-06-06 13:44 UTCEPSS rescore
  5. 2026-06-06 13:44 UTCEPSS rescore
  6. 2026-06-06 13:44 UTCEPSS rescore
  7. 2026-06-05 22:44 UTCEPSS rescore
  8. 2026-06-05 22:44 UTCEPSS rescore
  9. 2026-06-05 06:07 UTCEPSS rescore
  10. 2026-06-04 13:09 UTCEPSS rescore
  11. 2026-06-04 13:09 UTCEPSS rescore
  12. 2026-06-02 20:10 UTCEPSS rescore
  13. 2026-06-02 20:10 UTCEPSS rescore
  14. 2026-06-01 13:49 UTCEPSS rescore
  15. 2026-06-01 13:49 UTCEPSS rescore
  16. 2026-05-31 00:13 UTCEPSS rescore
  17. 2026-05-31 00:13 UTCEPSS rescore
  18. 2026-05-29 13:40 UTCEPSS rescore
  19. 2026-05-27 13:38 UTCEPSS rescore
  20. 2026-05-27 13:38 UTCEPSS rescore
  21. 2026-05-26 13:41 UTCEPSS rescore
  22. 2026-05-26 13:41 UTCEPSS rescore
  23. 2026-05-26 07:16 UTCEPSS rescore
  24. 2026-05-26 07:16 UTCEPSS rescore
  25. 2026-05-22 21:15 UTCEPSS rescore
  26. 2026-05-22 21:15 UTCEPSS rescore
  27. 2026-05-20 22:37 UTCEPSS rescore
  28. 2026-05-20 22:37 UTCEPSS rescore
  29. 2026-05-20 07:23 UTCEG score recompute
  30. 2026-05-20 07:23 UTCGHSA enrichment
  31. 2026-05-20 03:11 UTCEG score recompute
  32. 2026-05-20 03:11 UTCGHSA enrichment
  33. 2026-05-19 22:59 UTCEG score recompute
  34. 2026-05-19 22:59 UTCGHSA enrichment
  35. 2026-05-19 18:47 UTCEG score recompute
  36. 2026-05-19 18:47 UTCGHSA enrichment
  37. 2026-05-19 14:34 UTCEG score recompute
  38. 2026-05-19 14:34 UTCGHSA enrichment
  39. 2026-05-19 10:05 UTCEG score recompute
  40. 2026-05-19 10:05 UTCGHSA enrichment
  41. 2026-05-19 05:54 UTCEG score recompute
  42. 2026-05-19 05:53 UTCGHSA enrichment
  43. 2026-05-19 01:42 UTCEG score recompute
  44. 2026-05-19 01:42 UTCGHSA enrichment
  45. 2026-05-18 21:29 UTCEPSS rescore

Frequently asked(5)

What is CVE-2009-2494?
CVE-2009-2494 is a critical vulnerability published on August 12, 2009. The Active Template Library (ATL) in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP2, Vista Gold, SP1, and SP2, and Server 2008 Gold and SP2 allows remote attackers to execute arbitrary code via vectors related to erroneous free operations after reading a variant from a stream and…
When was CVE-2009-2494 disclosed?
CVE-2009-2494 was first published in the National Vulnerability Database on August 12, 2009, with the most recent update on April 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2009-2494 actively exploited?
CVE-2009-2494 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 98.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2009-2494?
CVE-2009-2494 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2009-2494?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2009-2494, 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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