Buffer overflow in Fireware OS - CVE-2025-11838
Published: December 8, 2025
Vulnerability identifier: #VU119376
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2025-11838
CWE-ID: CWE-119
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 attacker to perform a denial of service attack.
The vulnerability exists due to a boundary error in the Mobile User VPN with IKEv2 and the Branch Office VPN using IKEv2. A remote attacker can trigger memory corruption and perform a denial of service attack.
How to mitigate CVE-2025-11838
Install updates from vendor's website.