Microsoft: Windows Elevation of Privilege Vulnerability
An elevation of privilege vulnerability exists when the Windows AppX Deployment Server improperly handles junctions. To exploit this vulnerability, an attacker would first have to gain execution on the victim system. An attacker could then run a specially crafted application to elevate privileges. The security update addresses the vulnerability by correcting how AppX Deployment Server handles junctions.
Windows 10,Windows Server, version 1903 (Server Core installation),Windows Server, version 1803 (Server Core Installation),Windows Server 2019