Microsoft probing if Chinese hackers learned SharePoint flaws through alert: Report

Microsoft is investigating whether a leak from its early alert system for cybersecurity companies allowed Chinese hackers to exploit flaws in its SharePoint service before they were patched, Bloomberg News reported on Friday. A security patch Microsoft released this month failed to fully fix a critical flaw in the U.S. tech giant’s SharePoint server software, opening the door to a sweeping global cyber espionage effort.

In a blog post on Tuesday, Microsoft said two allegedly Chinese hacking groups, dubbed “Linen Typhoon” and “Violet Typhoon,” were…