FBI investigating ‘suspicious’ cyber activity on system holding sensitive surveillance information - Federal News Network

CYBERSECURITY FBI investigating ‘suspicious’ cyber activity on system holding sensitive surveillance information “The FBI identified and addressed suspicious activities on FBI networks, and we have leveraged all technical capabilities to respond,” the FBI said. ERIC TUCKER and ALANNA DURKIN RICHER March 6, 2026 3:32 pm           WASHINGTON (AP) — The FBI said this week that it is investigating “suspicious activities” on an internal system that contains sensitive information related to surveillance operations and investigations. The bureau is working to determine the scope and impact of the problem, according to a notification sent to members of Congress that says the unnamed culprit is using sophisticated techniques to exploit FBI network security controls. The notification, obtained Thursday by The Associated Press, says that the FBI on Feb. 17 began investigating abnormal log information related to a system on its network. “The affected system is unclassified and contains law enforcement sensitive information, including returns from legal process, such as pen register and trap and trace surveillance returns, and personally identifiable information pertaining to subjects of FBI investigations,” said the notification reviewed by The Associated Press.         See how leaders are modernizing cloud with confidence in a new ebook, sponsored by Pega and AWS. A pen register is a common surveillance tool that enables law enforcement to log phone numbers dialed by a particular line. The FBI confirmed the cyber incident in a statement but did not provide additional details. “The FBI identified and addressed suspicious activities on FBI networks, and we have leveraged all technical capabilities to respond,” the FBI said. “We have nothing additional to respond.” Neither the FBI statement nor the notification identified who might be responsible for the incident, but the bureau and other federal agencies have long been targets of foreign hackers seeking to spy on sensitive operations and decision-making. In this instance, the FBI said, the techniques being used were “sophisticated” and included leveraging a commercial internet service provider vendor’s infrastructure to exploit FBI network security controls. Copyright © 2026 The Associated Press. All rights reserved. This website is not intended for users located within the European Economic Area.           Sign up for breaking news. Related Stories Senate NDAA proposes CMMC grant program CYBERSECURITY Read more Sovereign AI systems built by national governments are hard, expensive and absolutely necessary CYBERSECURITY Read more Trump memo sets ‘aggressive’ timelines to secure sensitive systems CYBERSECURITY Read more Related Topics CYBERSECURITY FBI TECHNOLOGY Around the Web UPCOMING EVENTS Accelerating mission success with strategic AI adoption Federal Executive Forum Healthcare IT Strategies in Government Progress and Best Practices 2026 Modernizing federal cyber defense in the AI era Defense reimagined: Cybersecurity in the age of intelligent adversaries Securing the states, a CISO series: North Carolina edition More TOP STORIES Trump administration faces bipartisan pushback as lawmakers vet a slew of nominees CONGRESS Senate NDAA proposes CMMC grant program CYBERSECURITY The public’s opinion of civil servants continues to climb WORKFORCE DoD’s $9.7B award for Microsoft products derailed by protest CONTRACTS/AWARDS Senate NDAA rejects White House's tiered military pay raise, proposes 3.6% increase CONGRESS NDA proposal draws concerns of ‘chilling effect’ on federal employees WORKFORCE RIGHTS/GOVERNANCE