4,400+ Internet-Exposed Rockwell PLCs Expose Water Systems to Cyberattacks

A wave of cyberattacks against U.S. water and wastewater utilities has renewed alarm over how many industrial controllers remain directly reachable from the public internet. New research from Forescout has identified 4,407 internet-facing Rockwell Automation/Allen-Bradley programmable logic controllers (PLCs) exposing port 44818, the EtherNet/IP engineering protocol, with 65% located in the United States, followed by Canada at 12% and Spain at 3%. While this figure marks a 47% decline from a peak of 7,814 exposed devices in March 2020 to a low of 4,169 in June 2026, the sheer scale of exposure continues to leave critical infrastructure vulnerable to compromise. On July 28, Minnesota IT Services (MNIT) reported a coordinated...

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