US nuclear weapons agency ‘among 400 organisations breached by Chinese hackers’

Many large organisations use SharePoint as a platform for storing documents and allowing colleagues to collaborate on them. Photograph: Thomas Fuller/Sopa/Shutterstock

Microsoft says Chinese “threat actors”, including state-sponsored hackers, have exploited security vulnerabilities in its SharePoint document-sharing servers, with research indicating that several hundred government agencies and organisations have been breached.

Hackers have already breached 400 agencies, businesses and other groups, the Dutch cybersecurity company Eye Security said, adding: “We expect it may continue to rise as investigations progress.”