The US Treasury Department has confirmed that it was the victim of a significant cyber breach attributed to Chinese state-sponsored hackers. The incident involved unauthorized access to workstations and the theft of sensitive documents. Officials noted that the cyberattack was part of a broader pattern of incursions linked to China-backed actors. The breach raised alarms about the security of government systems, prompting investigations and discussions about the implications for national security. Lawmakers are expressing concern over the seriousness of the situation, questioning whether adequate measures were taken to respond to such vulnerabilities.