CVE-2020-1464: Microsoft Windows Spoofing Vulnerability

High severity, CVSS 7.8. Actively exploited: in CISA KEV since 2021-11-03. EPSS: 38.9% chance of exploitation in the next 30 days.

A spoofing vulnerability exists when Windows incorrectly validates file signatures. An attacker who successfully exploited this vulnerability could bypass security features and load improperly signed files. In an attack scenario, an attacker could bypass security features intended to prevent improperly signed files from being loaded. The update addresses the vulnerability by correcting how Windows validates file signatures.

Affected products

• Microsoft Windows 10 1507: affected versions not specified
• Microsoft Windows 10 1607: affected versions not specified
• 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 10 2004: affected versions not specified
• Microsoft Windows 7: affected versions not specified
• Microsoft Windows 8.1: affected versions not specified
• Microsoft Windows Rt 8.1: affected versions not specified
• Microsoft Windows Server 1903: affected versions not specified
• Microsoft Windows Server 1909: affected versions not specified
• Microsoft Windows Server 2004: affected versions not specified
• Microsoft Windows Server 2008: affected versions not specified; version r2 only
• Microsoft Windows Server 2012: affected versions not specified; version r2 only
• Microsoft Windows Server 2016: affected versions not specified
• Microsoft Windows Server 2019: affected versions not specified

Published 2020-08-17. Last modified 2026-06-17.