US Agencies Issue Updated Warning on Iranian Cyber Threats to Critical Infrastructure PLCs

US government agencies, including CISA, FBI, and EPA, have updated their advisory regarding Iranian-affiliated cyber actors targeting internet-connected operational technology (OT) devices. The new guidance focuses on detecting malicious changes in Rockwell Automation PLC programs and expands the scope to include other major PLC manufacturers like Schneider Electric and Siemens. This highlights ongoing cybersecurity risks to essential services.