CVE-2025-14321

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-14321
Use-after-free in the WebRTC: Signaling component. This vulnerability affects Firefox < 146, Firefox ESR < 140.6, Thunderbird < 146, and Thunderbird < 140.6.

9.8 /10

CVSS v3 : CRITICAL

V3 Legend

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

11 Dec 2025, 17:10

Type Values Removed Values Added
References () https://bugzilla.mozilla.org/show_bug.cgi?id=1992760 - () https://bugzilla.mozilla.org/show_bug.cgi?id=1992760 - Issue Tracking, Permissions Required
References () https://www.mozilla.org/security/advisories/mfsa2025-92/ - () https://www.mozilla.org/security/advisories/mfsa2025-92/ - Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2025-94/ - () https://www.mozilla.org/security/advisories/mfsa2025-94/ - Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2025-95/ - () https://www.mozilla.org/security/advisories/mfsa2025-95/ - Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2025-96/ - () https://www.mozilla.org/security/advisories/mfsa2025-96/ - Vendor Advisory
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 9.8
CPE cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
First Time Mozilla
Mozilla firefox
Mozilla thunderbird
CWE CWE-416

10 Dec 2025, 15:15

Type Values Removed Values Added
Summary (en) Use-after-free in the WebRTC: Signaling component. This vulnerability affects Firefox < 146 and Firefox ESR < 140.6. (en) Use-after-free in the WebRTC: Signaling component. This vulnerability affects Firefox < 146, Firefox ESR < 140.6, Thunderbird < 146, and Thunderbird < 140.6.
References
  • () https://www.mozilla.org/security/advisories/mfsa2025-95/ -
  • () https://www.mozilla.org/security/advisories/mfsa2025-96/ -

09 Dec 2025, 16:17

Type Values Removed Values Added
New CVE
Information

Published : 2025-12-09 16:17

Updated : 2025-12-11 21:15

NVD link : CVE-2025-14321

Mitre link : CVE-2025-14321

CVE.ORG link : CVE-2025-14321

JSON object : View

Products Affected

mozilla

  • thunderbird
  • firefox
CWE
CWE-416

Use After Free