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CISA Urges Water and Wastewater Systems Sector to Protect OT Against Activity Targeting PLCs
July 30, 2026 · CISA (US-CERT) · Severity: CRITICAL
CISA urgently warns water and wastewater systems sector organizations to protect OT systems against escalating cyber threats. Recent incidents show adversaries targeting critical water treatment infrastructure. Operators are urged to implement network segmentation, secure remote access, and develop OT-specific incident response plans.
Key Takeaways
- CISA urgently advises water and wastewater sector to protect OT systems against increased malicious cyber activity.
- Recent attacks on water systems demonstrate adversaries targeting PLCs HMIs and chemical treatment control systems.
- Water utilities should implement network segmentation remote access controls and incident response plans for OT environments.