Among the committees was the Cyber Safety Review Board that was conducting an investigation into the hack of American telecom companies by Beijing actors dubbed "Salt Typhoon."

The board had gained notoriety after investigating major hacking incidents including the Log4Shell vulnerability, the hacking group Lapsus$, and the compromises of Microsoft Exchange inboxes in 2023. The board was investigating the CCP-backed Salt Typhoon, a hacking group that compromised major telecom companies in the past few years.

The Department of Homeland Security has terminated all members of advisory committees, including one that has been investigating a major Chinese hack of large US telecom firms. "The Cyber Safety Review Board—a Department of Homeland Security investigatory body stood up under a Biden-era cybersecurity executive order to probe major cybersecurity incidents—has been cleared of non-government members as part of a DHS-wide push to cut costs under the Trump administration,

The Department of Homeland Security advisory committee was investigating a Chinese hack into U.S. telecommunications.