CVE-2012-0449

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 5.8% 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
9.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 6%CVSS v2: 9.3Exploit: None knownExposed: 0

A fix is available — apply it.

Mozilla Firefox before 3.6.26 and 4.x through 9.0, Thunderbird before 3.1.18 and 5.0 through 9.0, and SeaMonkey before 2.7 allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via a malformed XSLT stylesheet that is embedded in a document.

CVSS v2.0 (legacy)
9.3HIGHNVD never assigned a CVSS v3 rating to this CVE
EG Score
9.3(low)
EG Risk
49(Track)
EG Risk 49/100SSVC: Track

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%
Exploitation6% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
6%
EPSS %ILE
93%
KEV
Not listed

Published

February 1, 2012

Last Modified

April 29, 2026

References (26)

Vendor Advisories for CVE-2012-0449(2)

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

Patch Availability(6)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuthunderbird (10.0.2+build1-0ubuntu0.11.10.1) @ oneiric2026-05-29ubuntu
ubuntufirefox (10.0+build1-0ubuntu0.11.10.1) @ oneiric2026-05-29ubuntu
ubuntuthunderbird (3.1.18+build2+nobinonly-0ubuntu0.10.10.1) @ maverick2026-05-29ubuntu
ubuntuxulrunner-1.9.2 (1.9.2.26+build2+nobinonly-0ubuntu0.10.10.1) @ maverick2026-05-29ubuntu
redhatxulrunner-0:1.9.2.26-1.el6_22012-02-01redhat
redhatthunderbird-0:3.1.18-1.el6_22012-01-31redhat

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

(4 across 2 ecosystems)
Debian:6.0(3)
PackageVulnerable rangeFixed inDependents
iceape2.0.11-2 ... 2.0.11-9 (8 versions)2.0.11-10—
icedove3.0.11-1 ... 3.0.11-1+squeeze6 (7 versions)3.0.11-1+squeeze7—
iceweasel3.5.16-10 ... 3.5.16-9 (14 versions)3.5.16-12—
Debian:5.0(1)
PackageVulnerable rangeFixed inDependents
xulrunner1.9.0.10-1 ... 1.9.0.9-1 (34 versions)1.9.0.19-16—

Weakness Classification(1)

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

Additional Vendor Advisories

(4)

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 3× in last 7d / 14× 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 120 total refreshes for this CVE.

  1. 2026-08-23 00:12 UTCEPSS rescore
  2. 2026-08-21 23:43 UTCEPSS rescore
  3. 2026-08-19 16:59 UTCEPSS rescore
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  13. 2026-07-30 01:26 UTCEPSS rescore
  14. 2026-07-28 15:31 UTCEPSS rescore
  15. 2026-07-26 13:44 UTCEG score recompute▲ 9.30
  16. 2026-07-25 14:12 UTCEPSS rescore
  17. 2026-07-23 14:14 UTCEPSS rescore
  18. 2026-07-23 01:06 UTCEG score recompute
  19. 2026-07-23 00:10 UTCEG score recompute
  20. 2026-07-22 21:48 UTCEG score recompute
  21. 2026-07-22 14:04 UTCEPSS rescore
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  1. 2026-07-19 14:27 UTCEPSS rescore
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  21. 2026-06-30 23:19 UTCEPSS rescore
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  23. 2026-06-28 14:03 UTCEPSS rescore
  24. 2026-06-28 04:53 UTCEPSS rescore
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  26. 2026-06-27 03:05 UTCEPSS rescore
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  28. 2026-06-25 13:46 UTCEPSS rescore
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  35. 2026-06-21 14:53 UTCEPSS rescore
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  40. 2026-06-18 17:49 UTCEPSS rescore
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  42. 2026-06-17 17:49 UTCEPSS rescore
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  44. 2026-06-16 17:49 UTCEPSS rescore
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  46. 2026-06-15 17:44 UTCEPSS rescore
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  49. 2026-06-13 22:57 UTCEPSS rescore
  50. 2026-06-12 23:08 UTCEPSS rescore
  51. 2026-06-11 13:56 UTCEPSS rescore
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  62. 2026-06-04 13:09 UTCEPSS rescore
  63. 2026-06-02 20:10 UTCEPSS rescore
  64. 2026-06-02 20:10 UTCEPSS rescore
  65. 2026-06-01 13:49 UTCEPSS rescore
  66. 2026-05-31 22:28 UTCEPSS rescore
  67. 2026-05-31 22:28 UTCEPSS rescore
  68. 2026-05-31 00:14 UTCEPSS rescore
  69. 2026-05-31 00:14 UTCEPSS rescore
  70. 2026-05-29 13:41 UTCEPSS rescore
  71. 2026-05-29 05:36 UTCEG score recompute
  72. 2026-05-29 05:36 UTCVendor advisory
  73. 2026-05-29 05:35 UTCGHSA enrichment
  74. 2026-05-28 13:42 UTCEPSS rescore
  75. 2026-05-28 13:42 UTCEPSS rescore

Related CVEs(same vendor + same CWE)

Frequently asked(4)

What is CVE-2012-0449?
CVE-2012-0449 is a high vulnerability published on February 1, 2012. Mozilla Firefox before 3.6.26 and 4.x through 9.0, Thunderbird before 3.1.18 and 5.0 through 9.0, and SeaMonkey before 2.7 allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via a malformed XSLT stylesheet that is…
When was CVE-2012-0449 disclosed?
CVE-2012-0449 was first published in the National Vulnerability Database on February 1, 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-2012-0449 actively exploited?
CVE-2012-0449 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 6% probability of exploitation in the next 30 days, which ranks it in the top 7.4% of all scored CVEs.
How do I remediate CVE-2012-0449?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2012-0449, 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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