Congressional Budget Office investigating hack of its systems

Axios • November 7, 2025

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A foreign adversary is likely behind the hack , the Washington Post first reported.

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This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

Congressional Budget Office Hacked by Suspected Foreign Actors The U.S. Congressional Budget Office (CBO) confirmed it was hacked, potentially exposing sensitive government data. The breach, attributed to suspected foreign hackers, prompted the CBO to implement new security measures and monitoring protocols to protect its systems. The incident is currently under investigation. 3 sources 19

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Congressional Budget Office