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 — 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: 53%CVSS: 7.8Exploit: cisa kev · ssvc active · epss top5pct · epss highExposed: 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)
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
53%
EPSS %ILE
99%
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 52× in last 7d / 212× 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 623 total refreshes for this CVE.

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

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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 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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