Out-of-bounds write in Fireware OS - CVE-2026-3342
Published: March 3, 2026
Vulnerability identifier: #VU123429
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-2026-3342
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 escalate privileges on the system.
The vulnerability exists due to a boundary error when processing untrusted input. A remote authenticated administrator can send specially crafted requests via management interface to trigger an out-of-bounds write and execute arbitrary code with root privileges.
How to mitigate CVE-2026-3342
Install updates from vendor's website.