CVE-2020-16910: Microsoft Windows 10

Medium severity, CVSS 6.2. EPSS: 2.8% chance of exploitation in the next 30 days.

A security feature bypass vulnerability exists when Microsoft Windows fails to handle file creation permissions, which could allow an attacker to create files in a protected Unified Extensible Firmware Interface (UEFI) location. To exploit this vulnerability, an attacker could run a specially crafted application to bypass Unified Extensible Firmware Interface (UEFI) variable security in Windows. The security update addresses the vulnerability by correcting security feature behavior to enforce permissions.

Affected products

Microsoft Windows 10: affected versions not specified; version 1607 only; version 1709 only; version 1803 only; version 1809 only; version 1903 only; …
Microsoft Windows Server 2016: affected versions not specified; version 1903 only; version 1909 only; version 2004 only
Microsoft Windows Server 2019: affected versions not specified

Published 2020-10-16. Last modified 2026-06-17.