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Coordinated Cyberattack Targets 30+ Minnesota Water Systems as One Plant Goes Offline
July 29, 2026 · The Hacker News · Severity: MEDIUM
A coordinated cyberattack targeted operational technology at more than 30 Minnesota community water systems on July 26-27, 2026, triggering a statewide cybersecurity response. Braham's water plant went offline, Plymouth reported cellular communications failures at water towers and lift stations, and South St. Paul and Maple Plain experienced affected automated utility controls. Minnesota IT Services confirmed more than 30 systems were impacted but was not aware of active requests for residents to change drinking-water use. Officials have not publicly identified the attacker, affected products, or whether data was stolen. CISA and the FBI are investigating.
Key Takeaways
- A coordinated OT attack hit 30+ Minnesota water systems, causing at least one plant outage (Braham) and multiple communications/control failures across affected municipalities.
- No attacker attribution, exploited products, or stolen data confirmation has been released; CISA and FBI are leading the investigation.
- The incident highlights the vulnerability of critical infrastructure OT systems to coordinated cyberattacks, with water treatment and distribution networks as prime targets.