CVE-2025-9242

Out-of-Bounds Write in WatchGuard Firebox. CISA confirmed attackers exploit it and added it to its Known Exploited Vulnerabilities catalog on 12 November 2025.

Product
WatchGuard Firebox
Added to CISA's catalog
Federal fix-by date
Ransomware
No known use in ransomware campaigns

CISA’s description.

WatchGuard Firebox contains an out-of-bounds write vulnerability in the OS iked process that may allow a remote unauthenticated attacker to execute arbitrary code.

Every flaw CISA confirmed exploited in the last 30 days is on the exploit watch. This is not security advice. Check the vendor’s advisory before acting. From CISA’s catalog of 30 October 2026.