ZDI-26-749: WatchGuard FireWare OS samld SAMLSession Deserialization of Untrusted Data Remote Code Execution Vulnerability

This vulnerability allows remote attackers to execute arbitrary code on affected installations of WatchGuard FireWare OS. An attacker must first obtain the ability to write to the samld session directory on the target system in order to exploit this vulnerability. The ZDI has assigned a CVSS rating of 7.5. The following CVEs are assigned: CVE-2026-13046.