CVE-2012-4193

MEDIUMCVSS v2 · 6.86.8—
EchelonGraph scoreLOW confidence

This CVE was only ever scored under CVSS v2.0. NVD CVSS v2.0 base 6.8 — v2 rates that MEDIUM (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:P/I:P/A:P. 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 1.2% exploitation probability in the next 30 days, which is reflected in EG Risk but does not lift the v2 base. Confidence: LOW.

Triggered by: NVD CVSS v2.0 (legacy fallback)
Sources: EPSS, NVD CVSS v2.0
6.8EG
EchelonGraph verdictMonitorRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1.2%CVSS v2: 6.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Mozilla Firefox before 16.0.1, Firefox ESR 10.x before 10.0.9, Thunderbird before 16.0.1, Thunderbird ESR 10.x before 10.0.9, and SeaMonkey before 2.13.1 omit a security check in the defaultValue function during the unwrapping of security wrappers, which allows remote attackers to bypass the Same Origin Policy and read the properties of a Location object, or execute arbitrary JavaScript code, via a crafted web site.

CVSS v2.0 (legacy)
6.8MEDIUMNVD never assigned a CVSS v3 rating to this CVE
EG Score
6.8MEDIUMlow confidence
EG Risk
36
EG Risk 36/100

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 (value × EchelonGraph’s weight)
Severity68% × 45%
The EG Score, 6.8 of 10.
Exploitation1.2% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability30% × 15%
EchelonGraph's default before algorithm v3.4: CISA had not published Automatable for this CVE.
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track or Track* or Attend at high (mission-essential systems).
Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact unknown (not published for this CVE). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
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
1.2%
EPSS %ILE
66th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track or Track* or Attend at high (mission-essential systems).

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

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact unknown (not published for this CVE). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

Published

October 12, 2012

Last Modified

April 29, 2026

References (14)

Patch Availability(3)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntuthunderbird (16.0.1+build1-0ubuntu0.12.04.1) @ precise2026-05-29ubuntu
redhatxulrunner-0:10.0.8-2.el6_32012-10-12redhat
redhatthunderbird-0:10.0.8-2.el6_32012-10-12redhat

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.

Weakness Classification(1)

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

All Vendor Advisories

(3)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 8× in last 7d / 18× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 83 of 130 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 17 repeat rows among the latest 100 are merged into the row they repeat. The 47 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-11 13:39 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  2. 2026-10-10 19:54 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  3. 2026-10-09 20:00 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  4. 2026-10-08 16:34 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  5. 2026-10-07 23:39 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  6. 2026-10-06 15:10 UTCEPSS rescoreEPSS 1.2% · 65th percentile
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  8. 2026-10-04 23:16 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  9. 2026-10-03 14:20 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  10. 2026-09-29 08:30 UTCEG score recompute
  11. 2026-09-28 13:44 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  12. 2026-09-27 13:39 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  13. 2026-09-26 15:52 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  14. 2026-09-24 13:57 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  15. 2026-09-20 20:08 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  16. 2026-09-16 13:58 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  17. 2026-09-15 03:04 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  18. 2026-09-13 16:40 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  19. 2026-09-11 09:30 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  20. 2026-09-07 15:56 UTCEPSS rescoreEPSS 1.2% · 64th percentile
  21. 2026-09-05 15:22 UTCEPSS rescoreEPSS 1.2% · 64th percentile
  22. 2026-09-04 13:55 UTCEPSS rescoreEPSS 1.2% · 64th percentile
  23. 2026-08-28 21:34 UTCEPSS rescoreEPSS 1.2% · 64th percentile
  24. 2026-08-27 14:20 UTCEPSS rescoreEPSS 1.2% · 64th percentile
  25. 2026-08-26 14:40 UTCEPSS rescoreEPSS 1.2% · 64th percentile
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  1. 2026-08-23 00:12 UTCEPSS rescoreEPSS 1.2% · 64th percentile
  2. 2026-08-21 23:43 UTCEPSS rescoreEPSS 1.2% · 64th percentile
  3. 2026-08-19 16:59 UTCEPSS rescoreEPSS 1.2% · 64th percentile
  4. 2026-08-18 13:42 UTCEPSS rescoreEPSS 1.2% · 64th percentile
  5. 2026-08-16 02:09 UTCEPSS rescoreEPSS 1.2% · 64th percentile
  6. 2026-08-15 01:25 UTCEPSS rescoreEPSS 1.2% · 64th percentile
  7. 2026-08-09 13:42 UTCEPSS rescoreEPSS 1.2% · 64th percentile
  8. 2026-08-08 16:31 UTCEPSS rescoreEPSS 1.2% · 64th percentile
  9. 2026-08-07 16:21 UTCEPSS rescoreEPSS 1.2% · 63rd percentile
  10. 2026-08-06 13:41 UTCEPSS rescoreEPSS 1.2% · 63rd percentile
  11. 2026-08-05 19:12 UTCEPSS rescoreEPSS 1.2% · 63rd percentile
  12. 2026-08-04 15:04 UTCEPSS rescoreEPSS 1.2% · 63rd percentile
  13. 2026-07-30 01:26 UTCEPSS rescoreEPSS 1.2% · 63rd percentile
  14. 2026-07-28 15:31 UTCEPSS rescoreEPSS 1.2% · 63rd percentile
  15. 2026-07-26 13:46 UTCEG score recomputeFirst assessed: 6.8 MEDIUM
  16. 2026-07-25 14:12 UTCEPSS rescoreEPSS 1.2% · 63rd percentile
  17. 2026-07-23 14:14 UTCEPSS rescoreEPSS 1.2% · 63rd percentile
  18. 2026-07-23 01:08 UTCEG score recompute
  19. 2026-07-23 00:11 UTCEG score recompute
  20. 2026-07-22 21:50 UTCEG score recompute
  21. 2026-07-22 14:04 UTCEPSS rescoreEPSS 1.2% · 63rd percentile
  22. 2026-07-21 15:21 UTCEPSS rescoreEPSS 1.2% · 63rd percentile
  23. 2026-07-20 17:03 UTCEPSS rescoreEPSS 1.2% · 63rd percentile
  24. 2026-07-19 14:27 UTCEPSS rescoreEPSS 1.2% · 63rd percentile
  25. 2026-07-19 02:25 UTCEPSS rescoreEPSS 1.2% · 63rd percentile
  26. 2026-07-18 10:00 UTCEPSS rescoreEPSS 1.2% · 63rd percentile
  27. 2026-07-16 16:58 UTCEPSS rescoreEPSS 1.2% · 63rd percentile
  28. 2026-07-15 16:54 UTCEPSS rescoreEPSS 1.2% · 63rd percentile
  29. 2026-07-15 01:56 UTCEPSS rescoreEPSS 1.2% · 63rd percentile
  30. 2026-07-13 22:25 UTCEPSS rescoreEPSS 1.2% · 63rd percentile
  31. 2026-07-11 08:22 UTCEPSS rescoreEPSS 1.2% · 63rd percentile
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  37. 2026-07-04 06:27 UTCEPSS rescoreEPSS 1.2% · 63rd percentile
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  40. 2026-06-30 23:19 UTCEPSS rescoreEPSS 1.2% · 63rd percentile
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  43. 2026-06-28 04:53 UTCEPSS rescoreEPSS 1.2% · 63rd percentile
  44. 2026-06-27 03:05 UTCEPSS rescoreEPSS 1.2% · 63rd percentile
  45. 2026-06-25 13:46 UTCEPSS rescoreEPSS 1.2% · 63rd percentile
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  56. 2026-06-14 23:14 UTCEPSS rescoreEPSS 1.4% · 80th percentile
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  58. 2026-06-12 23:08 UTCEPSS rescoreEPSS 1.4% · 80th percentile

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Frequently asked(4)

What is CVE-2012-4193?
CVE-2012-4193 is a medium-severity vulnerability; its CVE record was published on October 12, 2012. Mozilla Firefox before 16.0.1, Firefox ESR 10.x before 10.0.9, Thunderbird before 16.0.1, Thunderbird ESR 10.x before 10.0.9, and SeaMonkey before 2.13.1 omit a security check in the defaultValue function during the unwrapping of security wrappers, which allows remote attackers to bypass the Same…
When was CVE-2012-4193 made public?
CVE-2012-4193 was made public on October 11, 2012: that is the date its CVE record's CNA, MITRE Corporation, gives for when the vulnerability was made public. The CVE record itself was published on October 12, 2012. EchelonGraph's copy of the record carries a last-modified date of April 29, 2026; the record at its source may have been updated since.
Is CVE-2012-4193 actively exploited?
CVE-2012-4193 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.2% probability of exploitation in the next 30 days (66th percentile of EPSS-scored CVEs).
How do I remediate CVE-2012-4193?
A fix for CVE-2012-4193 is available: update to the fixed version the vendor names in its advisory.

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