A critical flaw in Microsoft’s SharePoint software allowed China-linked hackers to breach dozens of systems worldwide, including US federal agencies and the nuclear weapons agency. Though no classified data has been confirmed stolen,

Microsoft says the Chinese threat actors Linen Typhoon, Violet Typhoon, and Storm-2603 have been exploiting the ToolShell zero-days.

Defense Secretary Pete Hegseth says the DOD is "looking into" a Microsoft cloud program that used Chinese engineers after an investigative report raised concerns about CCP access.

A report from ProPublica has claimed Microsoft is using these engineers to maintain the Department of Defense’s computer systems, with ‘minimal supervision by US personnel’.