US agencies alert to AI-driven hacks of Siemens control systems amid water plant attacks

Multiple U.S. government bodies issued a cybersecurity advisory on Aug. 19 warning that unidentified hackers are attempting to compromise Siemens S7 Series programmable logic controllers across sectors such as water, wastewater, manufacturing, energy, chemical, food and agriculture. The advisory, signed by the NSA, FBI, Department of Energy, Environmental Protection Agency and CISA, described the threat as "active" and warned that successful breaches could lead to operational downtime, safety incidents, equipment damage, data loss or broader cascading effects.

Agencies noted that the attackers are employing artificial-intelligence tools to reduce the expertise and time needed to craft effective exploits. The warning follows a spate of water-system cyber incidents in multiple states, which cybersecurity analysts suspect are tied to Iran, though federal officials have stopped short of formally attributing the attacks. President Donald Trump previously dismissed Iranian involvement, blaming the incidents on Minnesota. Siemens has not responded to requests for comment.