CVE-2025-14321

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CVSS 3.1

9.8 critical

EPSS

<1%p47

Published

Dec 9, 2025 (Dec 9, 2025)

Modified

Jun 17, 2026

Description

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.

Vendors: mozilla
Products: firefox, thunderbird
Weakness: CWE-416
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD CVE.org GitHub PoCs EPSS (0.6%)

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