CVE-2020-0697: Microsoft Office 365 Proplus

High severity, CVSS 7.8. EPSS: 0.9% chance of exploitation in the next 30 days.

An elevation of privilege vulnerability exists in Microsoft Office OLicenseHeartbeat task, where an attacker who successfully exploited this vulnerability could run this task as SYSTEM.To exploit the vulnerability, an authenticated attacker would need to place a specially crafted file in a specific location, thereby allowing arbitrary file corruption.The security update addresses the vulnerability by correcting how the process validates the log file., aka 'Microsoft Office Tampering Vulnerability'.

Affected products

• Microsoft Office 365 Proplus: affected versions not specified

Published 2020-02-11. Last modified 2026-06-17.