CVE-2012-2539

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 — 3 sources updated this weekExploited in the wild
9.0EG
EchelonGraph verdictMitigate nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 53%CVSS: 7.8Exploit: cisa kev · ssvc active · epss top5pct · epss highExposed services: Not assessed

A fix is referenced (a reference tagged "Patch", often a source commit), but no release containing it is confirmed — find the release that contains it; until it is applied, mitigate (WAF / firewall / segmentation).

Microsoft Word 2003 SP3, 2007 SP2 and SP3, and 2010 SP1; Word Viewer; Office Compatibility Pack SP2 and SP3; and Office Web Apps 2010 SP1 allow remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via crafted RTF data, aka "Word RTF 'listoverridecount' Remote Code Execution Vulnerability."

CVSS v3
7.8
EG Score
9.0CRITICALhigh confidence
EG Risk
81
EG Risk 81/100CISA SSVC

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%
CISA SSVC: Track at low, Attend at medium and Act at high mission impact.
Action: A fix is referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it and apply that within your standard update timelines at low, sooner than that at medium and as soon as possible at high mission impact; until then, restrict network exposure of the affected system or apply the vendor's mitigation.
EPSS PROB
53%
EPSS %ILE
98th
KEV
⚠ Exploited

CISA SSVCTrack at low, Attend at medium and Act at high mission impact.

A fix is referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it and apply that within your standard update timelines at low, sooner than that at medium and as soon as possible at high mission impact; until then, restrict network exposure of the affected system or apply the vendor's mitigation.

Exploitation active (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

December 12, 2012

Last Modified

April 22, 2026

Advisory Details (2)

Auto-updated May 19, 2026
⚠️ Active exploitation confirmed. Fix referenced — no release confirmed yet. Sources: cisa.
cisa🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2012-2539
generic

Microsoft Security Bulletin MS12-079 - Critical | Microsoft Learn

https://docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-079

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 48× in last 7d / 209× 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 934 total refreshes for this CVE.

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

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Frequently asked(6)

What is CVE-2012-2539?
CVE-2012-2539 is a critical vulnerability published on December 12, 2012. Microsoft Word 2003 SP3, 2007 SP2 and SP3, and 2010 SP1; Word Viewer; Office Compatibility Pack SP2 and SP3; and Office Web Apps 2010 SP1 allow remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via crafted RTF data, aka "Word RTF 'listoverridecount' Remote…
When was CVE-2012-2539 disclosed?
CVE-2012-2539 was first published on December 12, 2012, 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-2012-2539 actively exploited?
Yes. CISA added CVE-2012-2539 to the Known Exploited Vulnerabilities catalog on March 28, 2022, affecting Microsoft Word. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate attention. A fix is referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it and apply that; until then, restrict network exposure of the affected system or apply the vendor's mitigation.
What is the CVSS score of CVE-2012-2539?
CVE-2012-2539 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 (CRITICAL).
Which products are affected by CVE-2012-2539?
CVE-2012-2539 affects Microsoft Word.
How do I remediate CVE-2012-2539?
A fix for CVE-2012-2539 is referenced (a reference tagged "Patch", often a source commit), but EchelonGraph has no release containing it on record. Check that reference and the vendor's advisory for a release that contains the fix and update to it; until then, restrict network exposure of the affected system or apply the vendor's mitigation.

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