A significant cybersecurity breach at the US Treasury Department was disclosed, with officials stating that a China-based Advanced Persistent Threat (APT) actor gained access to employee workstations and some unclassified documents via a compromised third-party service provider. The incident, labelled a "major incident," is under investigation by multiple agencies, including the FBI. The compromised service provider has been taken offline, and there is currently no evidence of ongoing access. This incident highlights vulnerabilities in third-party security and the ongoing threat of state-sponsored cyberattacks.

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