CVE-2025-14321

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.

CVSS v3.1: 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v3.1: 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.58% chance of exploitation in the next 30 days, 46th percentile
Published: 2025-12-09
Updated: 2026-04-13

Proof-of-concept exploits (1)

h3raklez/CVE-2025-14321

References

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