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CBO Cyber Attack and Everest Ransomware Claims

First seen 23 Nov 2025, 03:36 UTC • •

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ThreatCluster •March 12, 2026 at 13:27 UTC

The US Congressional Budget Office confirmed a cyber attack by a suspected foreign actor, potentially exposing sensitive communications. Separately, 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.

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