GoKawiilCISA says over 100 US water systems hit in July cyberattack wave
CISA disclosed that hackers breached more than 100 internet-exposed water and wastewater systems across the U.S. during July, expanding the known scope of an ongoing campaign already reported in Michigan, Minnesota and other states. The attackers primarily targeted programmable logic controllers from vendors like Rockwell, Schneider Electric and Siemens, in some cases disabling shutdown alarms and safety processes without alerting operators.
GoKawiil's interpretation of the reporting above, not reported fact.
Although actual water service has not been disrupted, the ability to quietly disable safety alarms on industrial controllers shows how fragile many rural utility networks are against low-cost, opportunistic intrusions. With U.S. officials pointing to Iran as a likely actor amid regional tensions, the incidents underscore that critical infrastructure security gaps, not just sophisticated state hacking tools, remain the primary vulnerability.
- CISA confirmed over 100 water and wastewater systems were targeted in July.
- Attacks focused on PLCs from Rockwell, Schneider Electric and Siemens, some using AI-assisted scripts.
- Officials suspect Iran-linked actors, though no formal attribution has been made.
Practical Industrial Cybersecurity (Wiley) book — If CISA's warnings about PLC attacks on water utilities piqued your interest, this book walks through securing ICS/SCADA environments like the ones under attack. It covers the operational-technology fundamentals — controllers, network segmentation, and incident response — that separate an internet-exposed PLC from a defended one. A solid read for engineers, IT staff, or anyone curious how critical infrastructure actually gets protected.
See Practical Industrial Cybersecurity (Wiley) book on Amazon → Affiliate link — we may earn a commission on purchases, at no extra cost to you. Product picked by AI based on this article; it is not a tested recommendation.Source: techcrunch.com — Zack Whittaker, 2026-08-26
Published there as: “CISA confirms hackers targeted over 100 US water systems during July”
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