CISA Flags Critical WatchGuard Fireware Flaw Exposing 54,000 Fireboxes to No-Login Attacks

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Wednesday added a critical security flaw impacting WatchGuard Fireware to its Known Exploited Vulnerabilities (KEV) catalog, based on evidence of active exploitation.
The vulnerability in question is CVE-2025-9242 (CVSS score: 9.3), an out-of-bounds write vulnerability affecting Fireware OS 11.10.2 up to and including