Unpatched FURUNO FA-50 Vulnerabilities Impact Maritime Transponders

CISA alerted to two critical vulnerabilities in FURUNO FA-50 Class B AIS transponders (CVSSv3 9.1) that permit attackers to alter device settings — via hard-coded credentials and a missing authentication check — potentially disrupting maritime identification and navigation; no patches will be provided for this legacy hardware, so operators must enforce network isolation, firewalling, and strict physical access controls.