CVE-2025-14321
Use-after-free in the WebRTC: Signaling component
CRITICAL 9.8EPSS 0.6%
Use-after-free in the WebRTC: Signaling component. This vulnerability was fixed in Firefox 146, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6.
- Affected
- Mozilla · Firefox · Thunderbird
- CVSS v3.1 NVD
- 9.8 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS
- 0.60% chance of exploitation in the next 30 days, 47th percentile
- Published
- 2025-12-09
- Updated
- 2026-04-13
Proof-of-concept exploits (1)
- h3raklez/CVE-2025-143212★ · 2026-02-02
Security advisories
- https://www.mozilla.org/security/advisories/mfsa2025-92
- https://www.mozilla.org/security/advisories/mfsa2025-94
- https://www.mozilla.org/security/advisories/mfsa2025-95
- https://www.mozilla.org/security/advisories/mfsa2025-96
- https://bugzilla.mozilla.org/show_bug.cgi?id=1992760