US cybersecurity agency issues an urgent alert as Iranian hackers attack critical infrastructure — CISA guidance warns organizations to immediately shield certain programmable logic controllers from the internet to thwart future attacks

The U.S. Cybersecurity and Infrastructure Security Agency, in conjunction with the FBI and NSA, have issued an alert that Iranian-affiliated cyber attacks are threatening critical infrastructure, exploiting programmable logic controllers made by Rockwell Automation and Allen-Bradley to gain access.