Hackers in recent weeks have exploited flaws in SharePoint, a document management system developed by Microsoft Corp., to try to steal sensitive data from hundreds of victims.

LONDON >> A security patch released by Microsoft earlier this month failed to fully fix a critical flaw in the U.S. tech company’s SharePoint server software that had been identified at a hacking competition in May,

Microsoft blamed two Chinese nation-state actors for exploiting recently discovered security flaws in SharePoint to infiltrate vulnerable organizations, like schools, state governments, and the U.S. government’s top nuclear security agency.