High
An elevation of privilege vulnerability exists when the OneDrive for Windows Desktop application improperly handles symbolic links. An attacker who successfully exploited this vulnerability could overwrite a targeted file with an elevated status. To exploit this vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application that could exploit the vulnerability and delete a targeted file with an elevated status.
Privilege Elevation
Refer to Microsoft advisory for the complete list of affected products and their respective patches.
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-16851