CVE-2020-0638: Microsoft Update Notification Manager Privilege Escalation Vulnerability

High severity, CVSS 7.8. Actively exploited: in CISA KEV since 2022-05-23. EPSS: 2.4% chance of exploitation in the next 30 days.

An elevation of privilege vulnerability exists in the way the Update Notification Manager handles files.To exploit this vulnerability, an attacker would first have to gain execution on the victim system, aka 'Update Notification Manager Elevation of Privilege Vulnerability'.

Affected products

• Microsoft Windows 10 1709: affected versions not specified
• Microsoft Windows 10 1803: affected versions not specified
• Microsoft Windows 10 1809: affected versions not specified
• Microsoft Windows 10 1903: affected versions not specified
• Microsoft Windows 10 1909: affected versions not specified
• Microsoft Windows Server 1803: affected versions not specified
• Microsoft Windows Server 1903: affected versions not specified
• Microsoft Windows Server 1909: affected versions not specified
• Microsoft Windows Server 2019: affected versions not specified

Published 2020-01-14. Last modified 2026-08-12.