CISA Urges Water and Wastewater Systems Sector to Protect OT Against Activity Targeting PLCs

July 30, 2026 · CISA (US-CERT) · Severity: CRITICAL

CISA is currently observing a significant increase in cyber threat actors targeting programmable logic controllers (PLCs) in the Water and Wastewater Systems (WWS) Sector.

Key Takeaways

CISA is currently observing a significant increase in cyber threat actors targeting programmable logic controllers.
CISA urges critical infrastructure owners, operators, and integrators to remove publicly exposed PLCs and other.
Even water organizations with mature cybersecurity processes should validate their external connections, as this.