CVE-2009-0238

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 2026-04-14), 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: 43%CVSS: 8.8Exploit: cisa kev · ssvc active · epss top5pctExposed: 0

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

Microsoft Office Excel 2000 SP3, 2002 SP3, 2003 SP3, and 2007 SP1; Excel Viewer 2003 Gold and SP3; Excel Viewer; Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats SP1; and Excel in Microsoft Office 2004 and 2008 for Mac allow remote attackers to execute arbitrary code via a crafted Excel document that triggers an access attempt on an invalid object, as exploited in the wild in February 2009 by Trojan.Mdropper.AC.

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
43%
EPSS %ILE
99%
KEV
⚠ Exploited

Published

February 25, 2009

Last Modified

April 22, 2026

Advisory Details (6)

Auto-updated May 2, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic

IBM X-Force Exchange

https://exchange.xforce.ibmcloud.com/vulnerabilities/48875
generic🟡 PoC Available

Microsoft Security Bulletin MS09-009 - Critical | Microsoft Learn

https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-009
generic

VUPEN Security - Vulnerability Research and Intelligence

http://www.vupen.com/english/advisories/2009/1023
generic

Risk Detected

http://www.symantec.com/business/security_response/writeup.jsp?docid=2009-022310-4202-99
generic
http://www.securityfocus.com/bid/33870
generic

SANS.edu Internet Storm Center - SANS Internet Storm Center

http://isc.sans.org/diary.html?storyid=5923

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 52× in last 7d / 220× 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 824 total refreshes for this CVE.

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

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Frequently asked(6)

What is CVE-2009-0238?
CVE-2009-0238 is a critical vulnerability published on February 25, 2009. Microsoft Office Excel 2000 SP3, 2002 SP3, 2003 SP3, and 2007 SP1; Excel Viewer 2003 Gold and SP3; Excel Viewer; Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats SP1; and Excel in Microsoft Office 2004 and 2008 for Mac allow remote attackers to execute arbitrary code via a…
When was CVE-2009-0238 disclosed?
CVE-2009-0238 was first published in the National Vulnerability Database on February 25, 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-2009-0238 actively exploited?
Yes. CISA added CVE-2009-0238 to the Known Exploited Vulnerabilities catalog on April 14, 2026, affecting Microsoft Office. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2009-0238?
CVE-2009-0238 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-2009-0238?
CVE-2009-0238 affects Microsoft Office. 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-2009-0238?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2009-0238, 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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