Out-of-bounds write in Fireware OS - CVE-2025-12026
Published: December 8, 2025
Vulnerability identifier: #VU119375
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-12026
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: WatchGuard
Affected software:
Fireware OS
Fireware OS
Detailed vulnerability description
The vulnerability allows a remote user to compromise vulnerable system.
The vulnerability exists due to a boundary error when processing untrusted input passed via certd CLI. A remote privileged user can trigger an out-of-bounds write and execute arbitrary code on the target system.
How to mitigate CVE-2025-12026
Install updates from vendor's website.