CVE-2025-14321

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 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://bugzilla.mozilla.org/show_bug.cgi?id=1992760	Issue Tracking Permissions Required
https://www.mozilla.org/security/advisories/mfsa2025-92/	Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-94/	Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-95/	Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-96/	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:mozilla:firefox:::::esr:::*
	cpe:2.3:a:mozilla:firefox:::::-:::*
	cpe:2.3:a:mozilla:thunderbird:::::esr:::*
	cpe:2.3:a:mozilla:thunderbird:::::-:::*

History

05 Oct 2026, 15:10

Type	Values Removed	Values Added
Summary	~~(es) Uso después de liberación en el componente de señalización de WebRTC. Esta vulnerabilidad afecta a Firefox < 146, Firefox ESR < 140.6, Thunderbird < 146, y Thunderbird < 140.6.~~	(es) Uso después de liberación en el componente de señalización de WebRTC. Esta vulnerabilidad afecta a Firefox menor que 146, Firefox ESR menor que 140.6, Thunderbird menor que 146, y Thunderbird menor que 140.6.

30 Sep 2026, 17:10

Type	Values Removed	Values Added
Summary		(es) Uso después de liberación en el componente de señalización de WebRTC. Esta vulnerabilidad afecta a Firefox < 146, Firefox ESR < 140.6, Thunderbird < 146, y Thunderbird < 140.6.

Information

Published : 2025-12-09 16:17

Updated : 2026-10-07 20:10

NVD link : CVE-2025-14321

Mitre link : CVE-2025-14321

CVE.ORG link : CVE-2025-14321

JSON object : View

Products Affected

mozilla

firefox
thunderbird

CWE

CWE-416

Use After Free

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