WatchGuard Firebox Out of Bounds Write Vulnerability (CVE-2025-14733)
Severity: critical · Patch status: unknown · Since 2025-12-19 · CVE-2025-14733
WatchGuard Fireware OS iked process contains an out of bounds write vulnerability in the OS iked process. This vulnerability may allow a remote unauthenticated attacker to execute arbitrary code and affects both the mobile user VPN with IKEv2 and the branch office VPN using IKEv2 when configured with a dynamic gateway peer. CISA added CVE-2025-14733 to its Known Exploited Vulnerabilities catalog on Dec 19, 2025, which means attackers are exploiting it in the wild. CISA reports known use in ransomware campaigns.
What to do
- Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- US federal agencies must remediate by Dec 26, 2025 (BOD 22-01); treat that as the outer limit.
Sources
All live incidents on Threat Watch
