Bug-tracking database

Microsoft kept secret that its bug-tracking database was hacked in 2013

Reportedly, Microsoft had also suffered a data breach four and a half years ago (in 2013), when a "highly sophisticated hacking group" breached its bug-reporting and patch-tracking database, but the hack was never made public until today.

According to five former employees of the company, interviewed separately by Reuters, revealed that the breached database had been "poorly protected with access possible via little more than a password."