Iranian-Affiliated Cyber Actors Exploit Programmable Logic Controllers Across US Critical Infrastructure

Publication: April 7, 2026 Last Update: July 22, 2026 TLP: Clear From the updated version of the Joint Cybersecurity Advisory: Executive Summary The authoring agencies urgently warn U.S. organizations of ongoing Iranian-affiliated cyber targeting of internet-connected operational technology (OT) devices, including programmable logic controllers (PLCs). These actions disrupted PLCs across several U.S. critical infrastructure sectors…

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