A ceasefire does not clear out the cyber footholds already sitting in U.S. critical systems. If an attacker still has access to PLCs, they can keep changing how pumps, valves, and other physical processes behave even after kinetic fighting pauses.
Six U.S. agencies warned that Iranian-affiliated actors had been manipulating PLCs in water, energy, and government services since at least March. Victim organizations confirmed operational disruptions and financial losses, and the advisory landed before the ceasefire took effect.
The risk is persistence in the control layer, not another front-door breach. That makes remotely managed OT and IoT controllers a standing target, even when the wider conflict appears to have cooled.