CVE-2020-1391: Microsoft Windows 10

Medium severity, CVSS 5.5. EPSS: 1.3% chance of exploitation in the next 30 days.

An information disclosure vulnerability exists when the Windows Agent Activation Runtime (AarSvc) fails to properly handle objects in memory, aka 'Windows Agent Activation Runtime Information Disclosure Vulnerability'.

Affected products

• Microsoft Windows 10: version 1903 only; version 1909 only; version 2004 only
• Microsoft Windows Server 2016: version 1903 only; version 1909 only; version 2004 only

Published 2020-07-14. Last modified 2026-06-17.