U.S. Agencies Warn of Iranian Hackers Targeting Industrial Systems

Attacks aim to disrupt critical infrastructure sectors like government, water, and energy

Apr. 7, 2026 at 8:40pm

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A highly detailed, glowing 3D macro illustration of an industrial control panel with pulsing neon cyan and magenta lights, conceptually representing the compromised Rockwell Automation systems targeted by Iranian hackers.Glowing industrial control systems targeted by Iranian hackers expose the growing cybersecurity risks to critical U.S. infrastructure.Today in Milwaukee

Multiple U.S. federal agencies have issued a joint advisory warning that Iranian-affiliated hackers are actively breaking into industrial control systems in the United States, with the goal of causing operational disruptions and financial losses across critical infrastructure sectors like government services, water and wastewater, and the energy industry.

Why it matters

This marks the first public warning about domestic critical infrastructure threats since the start of the U.S. conflict with Iran, underscoring the growing cybersecurity risks to American industrial systems from state-sponsored hacking groups.

The details

The hackers are targeting internet-connected industrial control systems made by Rockwell Automation, a Milwaukee-based company, in an attempt to compromise and disrupt these vital systems. While the specific impacts of the attacks are still unclear, the advisory notes they have resulted in operational disruptions and financial losses for the victims.

  • The joint advisory was released on April 7, 2026.
  • The hackers have been actively targeting U.S. industrial systems since the start of the U.S. conflict with Iran in February 2026.

The players

Cybersecurity and Infrastructure Security Agency (CISA)

A federal agency under the Department of Homeland Security responsible for protecting critical infrastructure from cyber threats.

Federal Bureau of Investigation (FBI)

The primary federal law enforcement agency in the United States.

National Security Agency (NSA)

A U.S. intelligence agency responsible for global monitoring, collection, and processing of information for foreign and domestic intelligence and counterintelligence purposes.

Department of Energy

A cabinet-level department of the United States government concerned with policies regarding energy and safety in handling nuclear material.

U.S. Cyber Command

The unified military command for cyberspace operations established in 2010.

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What’s next

The advisory recommends that organizations using Rockwell Automation's industrial control systems take vulnerable internet-connected controllers offline to mitigate the risk of compromise by the Iranian hackers.

The takeaway

This incident highlights the growing cybersecurity threats facing critical infrastructure in the U.S., particularly from state-sponsored hacking groups like those affiliated with Iran. It underscores the need for robust industrial control system security measures and close coordination between government agencies and the private sector to defend against these evolving threats.