CVE-2005-0399

MEDIUMCVSS v2 · 5.15.1—
EchelonGraph scoreLOW confidence

This CVE was only ever scored under CVSS v2.0. NVD CVSS v2.0 base 5.1 — 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:H/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 15.1% 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
5.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 15%CVSS v2: 5.1Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

Heap-based buffer overflow in GIF2.cpp in Firefox before 1.0.2, Mozilla before to 1.7.6, and Thunderbird before 1.0.2, and possibly other applications that use the same library, allows remote attackers to execute arbitrary code via a GIF image with a crafted Netscape extension 2 block and buffer size.

CVSS v2.0 (legacy)
5.1MEDIUMNVD never assigned a CVSS v3 rating to this CVE
EG Score
5.1MEDIUMlow confidence
EG Risk
43
EG Risk 43/100CISA 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
Severity51% × 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

May 2, 2005

Last Modified

June 16, 2026

References (40)

Patch Availability(4)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntumozilla-firefox-locale-pl () @ warty2026-05-31ubuntu
redhatevolution-0:2.0.2-142005-03-23redhat
redhatfirefox-0:1.0.2-1.4.12005-03-23redhat
redhatthunderbird-0:1.0.2-1.4.12005-03-23redhat

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.

All Vendor Advisories

(4)

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 1× in last 7d / 7× 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.

  1. 2026-09-29 02:42 UTCEG score recompute
  2. 2026-09-18 19:20 UTCEPSS rescore
  3. 2026-09-17 19:20 UTCEPSS rescore
  4. 2026-09-17 19:20 UTCEPSS rescore
  5. 2026-09-12 14:54 UTCEPSS rescore
  6. 2026-09-10 09:23 UTCEPSS rescore
  7. 2026-09-04 04:59 UTCEPSS rescore
  8. 2026-08-08 16:30 UTCEPSS rescore
  9. 2026-08-05 19:11 UTCEPSS rescore
  10. 2026-07-26 13:25 UTCEG score recompute▲ 5.10
  11. 2026-07-25 14:11 UTCEPSS rescore
  12. 2026-07-24 14:11 UTCEPSS rescore
  13. 2026-07-23 00:47 UTCEG score recompute
  14. 2026-07-23 00:28 UTCEG score recompute
  15. 2026-07-22 23:51 UTCEG score recompute
  16. 2026-07-22 21:31 UTCEG score recompute
  17. 2026-07-18 09:59 UTCEPSS rescore
  18. 2026-07-18 09:59 UTCEPSS rescore
  19. 2026-07-15 16:53 UTCEPSS rescore
  20. 2026-07-15 01:55 UTCEPSS rescore
  21. 2026-07-15 01:55 UTCEPSS rescore
  22. 2026-07-13 22:24 UTCEPSS rescore
  23. 2026-07-11 08:22 UTCEPSS rescore
  24. 2026-07-11 08:22 UTCEPSS rescore
  25. 2026-07-08 15:09 UTCEPSS rescore
Show 57 more
  1. 2026-07-02 14:00 UTCEPSS rescore
  2. 2026-07-01 15:01 UTCEPSS rescore
  3. 2026-06-28 04:52 UTCEPSS rescore
  4. 2026-06-27 03:04 UTCEPSS rescore
  5. 2026-06-25 13:46 UTCEPSS rescore
  6. 2026-06-24 14:01 UTCEPSS rescore
  7. 2026-06-23 21:29 UTCEPSS rescore
  8. 2026-06-21 01:56 UTCEPSS rescore
  9. 2026-06-19 19:22 UTCEPSS rescore
  10. 2026-06-18 17:49 UTCEPSS rescore
  11. 2026-06-18 17:49 UTCEPSS rescore
  12. 2026-06-17 17:49 UTCEPSS rescore
  13. 2026-06-17 17:49 UTCEPSS rescore
  14. 2026-06-16 17:49 UTCEPSS rescore
  15. 2026-06-16 17:49 UTCEPSS rescore
  16. 2026-06-15 17:44 UTCEPSS rescore
  17. 2026-06-14 23:13 UTCEPSS rescore
  18. 2026-06-14 23:13 UTCEPSS rescore
  19. 2026-06-13 22:56 UTCEPSS rescore
  20. 2026-06-12 23:08 UTCEPSS rescore
  21. 2026-06-11 13:55 UTCEPSS rescore
  22. 2026-06-10 22:14 UTCEPSS rescore
  23. 2026-06-10 13:17 UTCEPSS rescore
  24. 2026-06-08 14:13 UTCEPSS rescore
  25. 2026-06-07 15:21 UTCEPSS rescore
  26. 2026-06-06 13:44 UTCEPSS rescore
  27. 2026-06-06 13:44 UTCEPSS rescore
  28. 2026-06-05 22:43 UTCEPSS rescore
  29. 2026-06-05 22:43 UTCEPSS rescore
  30. 2026-06-05 06:07 UTCEPSS rescore
  31. 2026-06-05 06:07 UTCEPSS rescore
  32. 2026-06-04 13:09 UTCEPSS rescore
  33. 2026-06-04 13:09 UTCEPSS rescore
  34. 2026-06-02 20:10 UTCEPSS rescore
  35. 2026-06-02 20:10 UTCEPSS rescore
  36. 2026-05-31 22:28 UTCEPSS rescore
  37. 2026-05-31 13:48 UTCEG score recompute
  38. 2026-05-31 13:48 UTCVendor advisory
  39. 2026-05-31 13:48 UTCGHSA enrichment
  40. 2026-05-31 00:13 UTCEPSS rescore
  41. 2026-05-31 00:13 UTCEPSS rescore
  42. 2026-05-29 13:40 UTCEPSS rescore
  43. 2026-05-29 13:40 UTCEPSS rescore
  44. 2026-05-28 13:42 UTCEPSS rescore
  45. 2026-05-28 13:42 UTCEPSS rescore
  46. 2026-05-28 13:42 UTCEPSS rescore
  47. 2026-05-27 13:37 UTCEPSS rescore
  48. 2026-05-26 07:16 UTCEPSS rescore
  49. 2026-05-26 07:16 UTCEPSS rescore
  50. 2026-05-24 16:42 UTCEPSS rescore
  51. 2026-05-22 21:15 UTCEPSS rescore
  52. 2026-05-21 22:38 UTCEPSS rescore
  53. 2026-05-20 22:36 UTCEPSS rescore
  54. 2026-05-20 22:36 UTCEPSS rescore
  55. 2026-05-20 11:20 UTCEPSS rescore
  56. 2026-05-20 11:20 UTCEPSS rescore
  57. 2026-05-18 21:29 UTCEPSS rescore

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Frequently asked(4)

What is CVE-2005-0399?
CVE-2005-0399 is a medium vulnerability published on May 2, 2005. Heap-based buffer overflow in GIF2.cpp in Firefox before 1.0.2, Mozilla before to 1.7.6, and Thunderbird before 1.0.2, and possibly other applications that use the same library, allows remote attackers to execute arbitrary code via a GIF image with a crafted Netscape extension 2 block and buffer…
When was CVE-2005-0399 disclosed?
CVE-2005-0399 was first published on May 2, 2005, with the most recent update on June 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2005-0399 actively exploited?
CVE-2005-0399 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-2005-0399?
A fix for CVE-2005-0399 is available: update to the fixed version the vendor names in its advisory.

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