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FBI probing cyberattack on its network
FBI is trying to determine the scale and impact of this incident

FBI probing cyberattack on its network

Mar 06, 2026
12:16 pm

What's the story

The Federal Bureau of Investigation (FBI) is probing "suspicious activities" on an internal system holding sensitive information related to surveillance operations and investigations. The agency is trying to determine the scale and impact of this incident, according to a notification sent to members of Congress. The unidentified culprit has been using advanced techniques to breach FBI network security controls.

Investigation details

Unclassified system holds sensitive information

The FBI launched an investigation on February 17 after detecting abnormal log information associated with a system on its network. The unclassified system in question holds law enforcement sensitive information, including returns from legal processes like pen register and trap and trace surveillance returns. It also contains personally identifiable information of subjects involved in FBI investigations, the notification said.

Official response

FBI has confirmed the cyber incident

The FBI has confirmed the cyber incident in a statement but has not provided any further details. "The FBI identified and addressed suspicious activities on FBI networks, and we have leveraged all technical capabilities to respond," the agency said. However, neither the statement nor the notification disclosed who could be behind this incident.

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Attack method

Sophisticated techniques used in this case

The FBI has said that the techniques used in this case were "sophisticated." They included using a commercial internet service provider vendor's infrastructure to breach FBI network security controls. This incident highlights the persistent threat of cyberattacks against federal agencies, especially those with sensitive operational and decision-making information.

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