10th November

Research.Checkpoint •[email protected] • November 10, 2025

For the latest discoveries in cyber research for the week of 10th November, please download our Threat Intelligence Bulletin. TOP ATTACKS AND BREACHES The US Congressional Budget Office (CBO) has confirmed a cyber attack that resulted in a suspected foreign threat actor breaching its network and potentially exposing sensitive communications between congressional offices and CBO […]

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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.

CBO Cyber Attack and Everest Ransomware Claims On November 10, 2025, the US Congressional Budget Office confirmed a cyber attack by a suspected foreign actor, potentially exposing sensitive communications. Separately, on November 3, 2025, the Everest ransomware group claimed responsibility for attacks on AT&T, Dublin Airport, and Air Arabia, exfiltrating sensitive data including 576,000 AT&T applicant records. 2 sources 18

10th November

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