CVE-2026-4266

CVE-2026-4266 describes an insecure deserialization in WatchGuard Fireware OS. Affects Fireware OS versions 12.1–12.11.8 and 2025.1–2026.1.2; Firebox platforms without Access Portal (e.g., T-15, T-35) are not affected. The vulnerability allows an attacker who has obtained write access to the loca...