Buffer overflow in Mozilla Firefox and Firefox for Android - CVE-2025-14861
Published: December 18, 2025
Vulnerability identifier: #VU120200
CSH Severity: High
CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-14861
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when processing HTML content. A remote attacker can trick the victim into visiting a specially crafted website, trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
Mozilla Firefox
Firefox for Android
Firefox for Android
How to mitigate CVE-2025-14861
Install updates from vendor's website.
Mozilla Firefox - update to 146.0.1
Firefox for Android - update to 146.0.1
Firefox for Android - update to 146.0.1