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 50× in last 7d / 211× 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 793 total refreshes for this CVE.

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