CISA, FBI, and NSA issue joint advisory AA25-343A on December 9, 2025, warning of active campaigns by four pro-Russia hacktivist groups exploiting VNC vulnerabilities in OT/ICS systems worldwide. THREAT ACTORS IDENTIFIED: ATTACK VECTOR: Mass exploitation of exposed VNC services (ports 5900-5910) with default/weak credentials on HMI devices. Direct SCADA access causing parameter modifications, alarm disabling, […]