#VU124306 Out-of-bounds write in Mozilla products - CVE-2026-4721

CSH
CYBERSECURITY HELP
Sign In REGISTER
 
Main Vulnerability Database Vulnerabilities #VU124306

#VU124306 Out-of-bounds write in Mozilla products - CVE-2026-4721

Published: March 24, 2026


Vulnerability identifier: #VU124306
Vulnerability risk: High
CVSSv4.0: 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/E:U/U:Amber
CVE-ID: CVE-2026-4721
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Mozilla Firefox
Firefox ESR
Firefox for Android
Software vendor:
Mozilla

Description

The vulnerability allows a remote attacker to execute arbitrary code.

The vulnerability exists due to memory safety bugs in multiple components when processing content. A remote attacker can trick the victim into visiting a specially crafted website and execute arbitrary code.

Multiple memory safety bugs were fixed; some showed evidence of memory corruption, indicating potential for arbitrary code execution.


Remediation

Install security update from vendor's website.

External links