Microsoft knew of SharePoint flaw in May, patch failed to block hackers

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, opening the door to a sweeping global cyber espionage operation, according to a timeline of events reviewed by Reuters.

A Microsoft spokesperson confirmed on Tuesday that its initial solution did not work. The spokesperson added that Microsoft had released further patches that fixed the issue.