Chinese hackers infiltrated the network of at least one state's National Guard and remained in its systems for over nine months, a Department of Homeland Security memo says. The findings, as first reported by NBC News,

Chinese hackers stole network diagrams, credentials, and personnel data in a breach that poses a threat to critical infrastructure nationwide.

A Department of Homeland Security memo from June, describing the Pentagon’s findings, said that the group, publicly known by the nickname Salt Typhoon, “extensively compromised a U.S. state’s Army National Guard network” from March 2024 through December 2024. The memo did not specify which state was affected.