CVE-2012-4186

HIGHCVSS v2 · 9.39.3—
EchelonGraph scoreLOW confidence

This CVE was only ever scored under CVSS v2.0. NVD CVSS v2.0 base 9.3 — v2 rates that HIGH (v2 bands: LOW 0.0–3.9 / MEDIUM 4.0–6.9 / HIGH 7.0–10.0; v2 has no CRITICAL band). Vector AV:N/AC:M/Au:N/C:C/I:C/A:C. CVSS v2 is an older, coarser metric than v3.1/v4.0 (no Scope, no User Interaction, no Attack Requirements), so it is not directly comparable to a v3 or v4 score. NVD has never re-scored this record under v3. EPSS predicts 14.7% exploitation probability in the next 30 days, which is reflected in EG Risk but does not lift the v2 base. Confidence: LOW.

Sources: epss, nvd_v2
Elevated
9.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 15%CVSS v2: 9.3Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

Heap-based buffer overflow in the nsWaveReader::DecodeAudioData function in Mozilla Firefox before 16.0, Firefox ESR 10.x before 10.0.8, Thunderbird before 16.0, Thunderbird ESR 10.x before 10.0.8, and SeaMonkey before 2.13 allows remote attackers to execute arbitrary code via unspecified vectors.

CVSS v2.0 (legacy)
9.3HIGHNVD never assigned a CVSS v3 rating to this CVE
EG Score
9.3HIGHlow confidence
EG Risk
62
EG Risk 62/100CISA 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
Severity93% × 45%
Exploitation40% × 40%
Automatability30% × 15%
CISA SSVC: Track at low, Track or Track* at medium and Track* or Attend at high mission impact.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
15%
EPSS %ILE
96th
KEV
Not listed

CISA SSVCTrack at low, Track or Track* at medium and Track* or Attend at high mission impact.

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (EG-KEV: elevated) · Automatable unknown (not published for this CVE) · Technical impact unknown (not published for this CVE). 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

October 10, 2012

Last Modified

April 29, 2026

References (40)

Vendor Advisories for CVE-2012-4186(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(4)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntufirefox (16.0+build1-0ubuntu0.12.04.1) @ precise2026-05-29ubuntu
ubuntuthunderbird (16.0.1+build1-0ubuntu0.11.10.1) @ oneiric2026-05-29ubuntu
redhatxulrunner-0:10.0.8-1.el6_32012-10-09redhat
redhatthunderbird-0:10.0.8-1.el6_32012-10-09redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(3 across 1 ecosystem)
Debian:6.0(3)
PackageVulnerable rangeFix by version rangeDependents
iceape2.0.11-10 ... 2.0.11-9 (14 versions)
  • every version up to 2.0.11-16: fixed in 2.0.11-16
—
icedove3.0.11-1 ... 3.0.11-1+squeeze9 (14 versions)
  • every version up to 3.0.11-1+squeeze14: fixed in 3.0.11-1+squeeze14
—
iceweasel3.5.16-10 ... 3.5.16-9 (21 versions)
  • every version up to 3.5.16-19: fixed in 3.5.16-19
—

Weakness Classification(1)

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

Additional Vendor Advisories

(2)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 2× in last 7d / 12× 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 112 total refreshes for this CVE.

  1. 2026-10-05 17:37 UTCEPSS rescore
  2. 2026-10-03 14:20 UTCEPSS rescore
  3. 2026-09-29 08:30 UTCEG score recompute
  4. 2026-09-28 13:44 UTCEPSS rescore
  5. 2026-09-27 13:39 UTCEPSS rescore
  6. 2026-09-26 15:52 UTCEPSS rescore
  7. 2026-09-24 13:57 UTCEPSS rescore
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  10. 2026-09-15 03:04 UTCEPSS rescore
  11. 2026-09-11 09:30 UTCEPSS rescore
  12. 2026-09-07 15:56 UTCEPSS rescore
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  15. 2026-08-28 21:34 UTCEPSS rescore
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  22. 2026-08-16 02:09 UTCEPSS rescore
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  24. 2026-08-09 13:42 UTCEPSS rescore
  25. 2026-08-08 16:31 UTCEPSS rescore
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  1. 2026-08-07 16:21 UTCEPSS rescore
  2. 2026-08-06 13:41 UTCEPSS rescore
  3. 2026-08-05 19:12 UTCEPSS rescore
  4. 2026-08-04 15:04 UTCEPSS rescore
  5. 2026-07-28 15:31 UTCEPSS rescore
  6. 2026-07-26 13:46 UTCEG score recompute▲ 9.30
  7. 2026-07-25 14:12 UTCEPSS rescore
  8. 2026-07-23 14:14 UTCEPSS rescore
  9. 2026-07-23 01:08 UTCEG score recompute
  10. 2026-07-23 00:11 UTCEG score recompute
  11. 2026-07-22 21:50 UTCEG score recompute
  12. 2026-07-22 14:04 UTCEPSS rescore
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  14. 2026-07-21 15:21 UTCEPSS rescore
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  19. 2026-07-16 16:58 UTCEPSS rescore
  20. 2026-07-15 16:54 UTCEPSS rescore
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  22. 2026-07-15 01:56 UTCEPSS rescore
  23. 2026-07-13 22:25 UTCEPSS rescore
  24. 2026-07-13 06:08 UTCEPSS rescore
  25. 2026-07-11 08:22 UTCEPSS rescore
  26. 2026-07-09 19:05 UTCEPSS rescore
  27. 2026-07-08 15:10 UTCEPSS rescore
  28. 2026-07-08 15:10 UTCEPSS rescore
  29. 2026-07-05 02:26 UTCEPSS rescore
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  31. 2026-07-02 14:01 UTCEPSS rescore
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  33. 2026-06-29 14:02 UTCEPSS rescore
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  37. 2026-06-27 03:05 UTCEPSS rescore
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  39. 2026-06-25 13:46 UTCEPSS rescore
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  41. 2026-06-24 14:02 UTCEPSS rescore
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  43. 2026-06-23 21:30 UTCEPSS rescore
  44. 2026-06-21 01:56 UTCEPSS rescore
  45. 2026-06-21 01:56 UTCEPSS rescore
  46. 2026-06-19 19:22 UTCEPSS rescore
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  48. 2026-06-18 17:49 UTCEPSS rescore
  49. 2026-06-18 17:49 UTCEPSS rescore
  50. 2026-06-17 17:49 UTCEPSS rescore
  51. 2026-06-17 17:49 UTCEPSS rescore
  52. 2026-06-16 17:49 UTCEPSS rescore
  53. 2026-06-16 17:49 UTCEPSS rescore
  54. 2026-06-15 17:44 UTCEPSS rescore
  55. 2026-06-14 23:14 UTCEPSS rescore
  56. 2026-06-14 23:14 UTCEPSS rescore
  57. 2026-06-12 23:08 UTCEPSS rescore
  58. 2026-06-11 13:56 UTCEPSS rescore
  59. 2026-06-10 22:14 UTCEPSS rescore
  60. 2026-06-10 13:18 UTCEPSS rescore
  61. 2026-06-08 14:14 UTCEPSS rescore
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  63. 2026-06-05 22:44 UTCEPSS rescore
  64. 2026-06-05 22:44 UTCEPSS rescore
  65. 2026-06-04 13:09 UTCEPSS rescore
  66. 2026-06-02 20:10 UTCEPSS rescore
  67. 2026-06-02 20:10 UTCEPSS rescore
  68. 2026-06-01 13:49 UTCEPSS rescore
  69. 2026-05-31 22:28 UTCEPSS rescore
  70. 2026-05-31 22:28 UTCEPSS rescore
  71. 2026-05-31 00:14 UTCEPSS rescore
  72. 2026-05-31 00:14 UTCEPSS rescore
  73. 2026-05-29 13:41 UTCEPSS rescore
  74. 2026-05-29 02:18 UTCEG score recompute
  75. 2026-05-29 02:18 UTCVendor advisory

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Frequently asked(4)

What is CVE-2012-4186?
CVE-2012-4186 is a high vulnerability published on October 10, 2012. Heap-based buffer overflow in the nsWaveReader::DecodeAudioData function in Mozilla Firefox before 16.0, Firefox ESR 10.x before 10.0.8, Thunderbird before 16.0, Thunderbird ESR 10.x before 10.0.8, and SeaMonkey before 2.13 allows remote attackers to execute arbitrary code via unspecified vectors.
When was CVE-2012-4186 disclosed?
CVE-2012-4186 was first published on October 10, 2012, with the most recent update on April 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2012-4186 actively exploited?
CVE-2012-4186 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 15% probability of exploitation in the next 30 days (96th percentile of EPSS-scored CVEs).
How do I remediate CVE-2012-4186?
A fix for CVE-2012-4186 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2012-4186 are linked in the Vendor Advisories panel on this page.

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