Critical
https://www.cisa.gov/uscert/ncas/alerts.xml
19 Sep 2026
Iranian Actors Exploit PLCs Across US Critical Infrastructure
Iranian-affiliated threat actors are actively exploiting Programmable Logic Controllers (PLCs) across US critical infrastructure. This activity poses a direct threat to operational technology (OT) environments. Organizations utilizing ICS/SCADA systems must immediately segment OT networks and review PLC firmware against known threat indicators.