The company said state-backed hacking groups were breaching systems through flaws in SharePoint, which is used by the U.S. government and companies around the world.

Microsoft Corp. accused Chinese state-sponsored hackers of using flaws in its SharePoint document management software in a hacking campaign that has targeted businesses and government agencies around the world.

Spy vs. spy China has accused US intelligence agencies of exploiting a Microsoft Exchange zero-day exploit to steal defense-related data and take over more than 50 devices belonging to a "major Chinese military enterprise" for nearly a year.