CISA warns of cyberattacks disrupting U.S. water utilities
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The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has issued an urgent alert warning of a surge in cyberattacks targeting internet-exposed programmable logic controllers (PLCs) in water and wastewater systems. Over 30 community water systems in Minnesota were disrupted in a coordinated attack, with hackers changing passwords, modifying IP addresses, and disconnecting devices to hinder operations. CISA urges immediate action to remove publicly accessible operational technology (OT) from the internet, especially Rockwell Automation MicroLogix 1400 PLCs, many of which are running end-of-sale firmware and are accessible via undocumented cellular modems.
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