Microsoft Azure File Sync Elevation of Privilege Vulnerability

According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?
Successful exploitation of this vulnerability requires an attacker to win a race condition.

According to the CVSS metric, privileges required is low (PR:L). What does that mean for this vulnerability?
Any authenticated attacker could trigger this vulnerability. It does not require admin or other elevated privileges.

What privileges could be gained by an attacker who successfully exploited the vulnerability?
Exploiting this vulnerability would allow the attacker to perform arbitrary deletion of files that are not accessible to unprivileged users on the victim machine.

According to the CVSS metric, user interaction is Required (UI:R). What does that mean for this vulnerability?
The successful exploitation of this vulnerability requires a user with administrator privileges to perform specific operations on the endpoint targeted by the attacker.

Security updates
17.3 — https://support.microsoft.com/kb/5039814
18.1 — https://support.microsoft.com/kb/5023058