Microsoft servers hacked by Chinese state-backed groups, firm says

Chinese "threat actors" have hacked Microsoft's SharePoint document software servers and targeted the data of the businesses using it, the firm has said.China state-backed Linen Typhoon and Violet Typhoon as well as China-based Storm-2603 were said to have "exploited vulnerabilities" in on-premises SharePoint servers, the kind used by firms, but not in its cloud-based service.The US tech giant has released…