CISA Issues Urgent Alert After 30 Minnesota Water Systems Were Paralyzed — 4,100 Exposed Rockwell PLCs Await the Next Assault

On August 3, 2026, CISA issued an urgent alert after attackers disrupted more than 30 community water systems in Minnesota within 48 hours. The attackers targeted internet-exposed programmable logic controllers (PLCs), changed passwords, and disconnected equipment from the network. Censys counts over 10,000 Rockwell, Siemens, and Schneider PLCs publicly accessible.