CVE-2015-4481

LOWCVSS v2 · 3.33.3—
EchelonGraph scoreLOW confidence

This CVE was only ever scored under CVSS v2.0. NVD CVSS v2.0 base 3.3 — v2 rates that LOW (v2 bands: LOW 0.0–3.9 / MEDIUM 4.0–6.9 / HIGH 7.0–10.0; v2 has no CRITICAL band). Vector AV:L/AC:M/Au:N/C:N/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 0.8% 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
Weaponized
3.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS v2: 3.3Exploit: Exploit-DB (verified) · public exploitExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Race condition in the Mozilla Maintenance Service in Mozilla Firefox before 40.0 and Firefox ESR 38.x before 38.2 on Windows allows local users to write to arbitrary files and consequently gain privileges via vectors involving a hard link to a log file during an update.

CVSS v2.0 (legacy)
3.3LOWNVD never assigned a CVSS v3 rating to this CVE
EG Score
3.3(low)
EG Risk
45(Track)
EG Risk 45/100SSVC: 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
Severity33% × 45%
Exploitation65% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
54%
KEV
Not listed

Published

August 16, 2015

Last Modified

May 6, 2026

References (22)

Data Freshness Timeline

(refreshed 6× in last 7d / 24× 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 119 total refreshes for this CVE.

  1. 2026-08-20 22:50 UTCEPSS rescore
  2. 2026-08-19 16:59 UTCEPSS rescore
  3. 2026-08-18 13:43 UTCEPSS rescore
  4. 2026-08-16 14:51 UTCEPSS rescore
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  6. 2026-08-15 01:25 UTCEPSS rescore
  7. 2026-08-12 13:46 UTCEPSS rescore
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  9. 2026-08-08 16:31 UTCEPSS rescore
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  16. 2026-07-30 16:23 UTCEPSS rescore
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  18. 2026-07-28 15:31 UTCEPSS rescore
  19. 2026-07-26 14:50 UTCEPSS rescore
  20. 2026-07-26 13:54 UTCEG score recompute▲ 3.30
  21. 2026-07-24 14:13 UTCEPSS rescore
  22. 2026-07-23 14:14 UTCEPSS rescore
  23. 2026-07-23 01:18 UTCEG score recompute
  24. 2026-07-23 00:20 UTCEG score recompute
  25. 2026-07-22 21:58 UTCEG score recompute
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  1. 2026-07-22 14:04 UTCEPSS rescore
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  4. 2026-07-20 17:03 UTCEPSS rescore
  5. 2026-07-19 14:27 UTCEPSS rescore
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  10. 2026-07-16 16:59 UTCEPSS rescore
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  12. 2026-07-15 16:54 UTCEPSS rescore
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  14. 2026-07-15 01:56 UTCEPSS rescore
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  16. 2026-07-12 05:42 UTCEPSS rescore
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  18. 2026-07-09 19:05 UTCEPSS rescore
  19. 2026-07-08 15:10 UTCEPSS rescore
  20. 2026-07-07 13:42 UTCEPSS rescore
  21. 2026-07-06 16:24 UTCEPSS rescore
  22. 2026-07-06 02:20 UTCEPSS rescore
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  24. 2026-07-04 06:27 UTCEPSS rescore
  25. 2026-07-02 15:21 UTCEPSS rescore
  26. 2026-07-01 15:02 UTCEPSS rescore
  27. 2026-07-01 15:02 UTCEPSS rescore
  28. 2026-06-30 23:19 UTCEPSS rescore
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  30. 2026-06-28 14:03 UTCEPSS rescore
  31. 2026-06-28 04:53 UTCEPSS rescore
  32. 2026-06-27 03:05 UTCEPSS rescore
  33. 2026-06-25 13:47 UTCEPSS rescore
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  35. 2026-06-24 14:02 UTCEPSS rescore
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  37. 2026-06-23 21:30 UTCEPSS rescore
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  40. 2026-06-21 14:54 UTCEPSS rescore
  41. 2026-06-21 01:57 UTCEPSS rescore
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  43. 2026-06-19 19:23 UTCEPSS rescore
  44. 2026-06-19 19:23 UTCEPSS rescore
  45. 2026-06-18 17:50 UTCEPSS rescore
  46. 2026-06-18 17:49 UTCEPSS rescore
  47. 2026-06-17 17:49 UTCEPSS rescore
  48. 2026-06-16 17:50 UTCEPSS rescore
  49. 2026-06-16 17:49 UTCEPSS rescore
  50. 2026-06-15 17:45 UTCEPSS rescore
  51. 2026-06-14 23:14 UTCEPSS rescore
  52. 2026-06-13 22:57 UTCEPSS rescore
  53. 2026-06-12 23:09 UTCEPSS rescore
  54. 2026-06-11 13:57 UTCEPSS rescore
  55. 2026-06-10 22:15 UTCEPSS rescore
  56. 2026-06-08 14:14 UTCEPSS rescore
  57. 2026-06-07 15:22 UTCEPSS rescore
  58. 2026-06-06 13:45 UTCEPSS rescore
  59. 2026-06-05 22:44 UTCEPSS rescore
  60. 2026-06-05 06:08 UTCEPSS rescore
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  62. 2026-06-04 13:10 UTCEPSS rescore
  63. 2026-06-04 13:09 UTCEPSS rescore
  64. 2026-06-02 20:10 UTCEPSS rescore
  65. 2026-06-02 20:10 UTCEPSS rescore
  66. 2026-06-01 13:49 UTCEPSS rescore
  67. 2026-06-01 13:49 UTCEPSS rescore
  68. 2026-05-31 22:28 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. 2026-05-29 13:41 UTCEPSS rescore
  73. 2026-05-28 13:42 UTCEPSS rescore
  74. 2026-05-28 13:42 UTCEPSS rescore
  75. 2026-05-27 13:38 UTCEPSS rescore

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-37925✓ verified
    First seen Aug 21, 2015

    Mozilla - Maintenance Service Log File Overwrite Privilege Escalation

    Open source ↗

Frequently asked(4)

What is CVE-2015-4481?
CVE-2015-4481 is a low vulnerability published on August 16, 2015. Race condition in the Mozilla Maintenance Service in Mozilla Firefox before 40.0 and Firefox ESR 38.x before 38.2 on Windows allows local users to write to arbitrary files and consequently gain privileges via vectors involving a hard link to a log file during an update.
When was CVE-2015-4481 disclosed?
CVE-2015-4481 was first published in the National Vulnerability Database on August 16, 2015, with the most recent update on May 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2015-4481 actively exploited?
CVE-2015-4481 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 46.3% of all scored CVEs.
How do I remediate CVE-2015-4481?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2015-4481, 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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