Multiple security agencies in the United States have issued warnings about an active cyber threat from foreign hackers. These attackers are utilizing AI tools to penetrate American infrastructure and compromise the water supply.

The Cybersecurity and Infrastructure Security Agency (CISA) released a report emphasizing the vulnerabilities in systems using Siemens S7 Series programmable logic controllers (PLCs). The report advised owners and operators to implement pertinent safety measures to safeguard their devices and systems. The advisory highlighted, “The Siemens-specific content in this advisory should be understood and applied as one subset of the wider threat landscape.”

Newsweek contacted Siemens for a response via email on the same day.

The threat involves hackers conducting reconnaissance and developing capabilities against Siemens PLC installations based in the U.S. They employ AI-generated scripts, disguised as genuine monitoring tools, to compromise these systems. The advisory noted that these attackers use internet scanning services to identify PLCs that are exposed online, running outdated software, or lacking adequate protection.

The targeted infrastructure includes energy, water, wastewater, chemical, and commercial facilities. The advisory clarifies, “This is not a theoretical risk—it is an active threat.” Exploitation of vulnerable PLCs can disrupt essential industrial processes. It can lead to safety incidents, equipment downtime or damage, data breaches, compliance issues, and cascading effects on interconnected systems.

This is a breaking news story. Further updates are anticipated.