Critical Vulnerability in WatchGuard Firebox OS Actively Exploited

Critical Vulnerability in WatchGuard Firebox OS Actively Exploited

First seen 13 Nov 2025, 17:30 UTC •Filestore.FortinetBleepingcomputerDigital.Nhs.Uk •57.9

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A critical vulnerability (CVE-2025-9242) in WatchGuard Firebox OS allows remote unauthenticated attackers to execute arbitrary code. Affected versions include Fireware OS 11.x, 12.x, and 2025.1. The U.S. Cybersecurity & Infrastructure Security Agency (CISA) has added this vulnerability to its Known Exploited Vulnerabilities list and advised immediate patching.

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