Microsoft: Windows Update Client Information Disclosure Vulnerability
An information disclosure vulnerability exists when Windows Update Client fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability could potentially disclose memory contents of an elevated process. To exploit this vulnerability, an authenticated attacker could run a specially crafted application in user mode. The update addresses the vulnerability by correcting how the Windows Update Client handles objects in memory.
Windows 10,Windows Server, version 1903 (Server Core installation),Windows Server 2019