The US Treasury Department confirmed a major cyber attack in which documents were stolen and systems were breached through a third-party cybersecurity service provider, BeyondTrust. This breach allowed hackers remote access to key systems, with initial assessments pointing to a China-based threat actor. China has denied involvement in the attack. The breach was detected in early December, and the Treasury is expected to provide more details in a forthcoming report. This incident follows a recent telecom breach targeting major US firms, attributed to a Chinese state-sponsored group. The US and China exchanged accusations, with China denying hacking allegations. The Chinese embassy in Washington DC called for an end to cyber security accusations against China.