UpGuard

A storage device with 1.7 terabytes of data about telecom installations across the Russian Federation was discovered by UpGuard to be hosted on an rsync server set up for open access.

This information relates to telecom infrastructure projects and contains schematics, administrator credentials, email archives, and other resources.

Nokia and Mobile TeleSystems appear to be the main entities impacted by the vulnerability.

Nokia claims in an email sent to UpGuard that the data set "was a hand-over folder" given by a Nokia employee to an unidentified third party.

Source: https://www.upguard.com/breaches/mts-nokia-telecom-inventory-data-exposure

"id": "UPG7514423",
"linkid": "upguard",
"type": "Data Leak",
"date": "09/2019",
"severity": "60",
"impact": "4",
"explanation": "Attack with significant impact with customers data leaks"