CVE-2012-2539

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 2022-03-28), 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
7.8
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS: 53%CVSS: 7.8Exploit: NoneExposed: 0

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

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
9.0(high)
EPSS
98.9%
KEV
⚠ Exploited

Published

December 12, 2012

Last Modified

April 22, 2026

Advisory Details (2)

Auto-updated May 19, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa.
cisa Patch Available🔴 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 55× in last 7d / 213× 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 397 total refreshes for this CVE.

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

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Frequently asked(6)

What is CVE-2012-2539?
CVE-2012-2539 is a high 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 in the National Vulnerability Database 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 patching attention.
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.
Which products are affected by CVE-2012-2539?
CVE-2012-2539 affects Microsoft Word. 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-2012-2539?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2012-2539, 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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