4,400 Exposed Rockwell PLCs: The Water Utility Attacks Didn’t Need a Zero-Day
Forescout’s Vedere Labs identified 4,407 internet-exposed Rockwell Automation/Allen-Bradley PLCs in an August 2026 scan, including 22 in cities affected by coordinated attacks on US water utilities. Attackers achieved disruption without exploiting any vulnerability: they changed IP addresses and set passwords on controllers that were already publicly reachable.