An elevation of privilege vulnerability exists in the way that the Microsoft Store Install Service handles file operations in protected locations, aka 'Windows Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2020-0934, CVE-2020-0983, CVE-2020-1011, CVE-2020-1015.
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1009