FBI, NSA and CISA issued a joint warning‘Tampering with safety alarms and emergency shutdowns’Read the updated warning by FBI, NSA and CISAThe 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). Affected ProductsPotentially all internet exposed PLCs, including Rockwell Automation/Allen-Bradley, Schneider Electric, Siemens, and other branded/manufactured PLCs. If you suspect your organization was targeted, including against other branded PLC devices, contact the authoring agencies and PLC manufacturer for guidance. US federal cyber agencies have issued an urgent joint warning, claiming that Iranian state-backed hackers are actively breaching and tampering with industrial control systems at US water and energy providers. CISA and partner agencies are calling on all critical infrastructure operators to immediately audit their operational technology, disconnect industrial control systems from the public internet, and enforce strict multi-factor authentication.