NULL pointer dereference in Fireware OS - CVE-2026-13084
Published: July 3, 2026
Vulnerability identifier: #VU136893
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-2026-13084
CWE-ID: CWE-476
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 cause a denial of service.
The vulnerability exists due to a null pointer dereference in the iked service when handling specially crafted IKEv2 messages. A remote attacker can send specially crafted IKEv2 messages to cause a denial of service.
The issue affects Mobile User VPN with IKEv2 and Branch Office VPN using IKEv2 when configured with a dynamic gateway peer.
How to mitigate CVE-2026-13084
Install security update from vendor's website.