CVE-2025-3030HIGH 8.1EPSS p32.8%

CVE-2025-3030CVE-2025-3030

Description

Memory safety bugs present in Firefox 136, Thunderbird 136, Firefox ESR 128.8, and Thunderbird 128.8. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 137, Firefox ESR 128.9, Thunderbird 137, and Thunderbird 128.9.

Scoring

CVSS 3.18.1 (HIGH)
VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS0.41% probability of exploitation · percentile 32.8% · 2026-06-19T12:03:05Z
Published2025-04-01
Last modified2026-04-13

Underlying weaknesses· 1

CWE-416

References

  1. https://bugzilla.mozilla.org/buglist.cgi?bug_id=1850615%2C1932468%2C1942551%2C1951017%2C1951494
  2. https://www.mozilla.org/security/advisories/mfsa2025-20/
  3. https://www.mozilla.org/security/advisories/mfsa2025-22/
  4. https://www.mozilla.org/security/advisories/mfsa2025-23/
  5. https://www.mozilla.org/security/advisories/mfsa2025-24/
  6. https://lists.debian.org/debian-lts-announce/2025/04/msg00005.html

1

TypeTargetConfidenceTier
WeaknessUse After Freecwe-4160%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.