Hackers Exploit Industrial PLCs and Manipulate HMI Displays to Hide Attacks

Six federal agencies have updated a joint advisory warning that Iranian-affiliated advanced persistent threat (APT) actors are actively exploiting internet-exposed programmable logic controllers (PLCs) across U.S. critical infrastructure, manipulating human-machine interface (HMI) displays so operators cannot visually detect the intrusion. The advisory, first issued in April 2026 and revised on July 22, 2026, is cosigned […]

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