CVE-2020-1123

A denial of service vulnerability exists when Connected User Experiences and Telemetry Service improperly handles file operations. An attacker who successfully exploited this vulnerability could cause a system to stop responding.
To exploit the 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.
The security update addresses the vulnerability by  correcting how the Connected User Experiences and Telemetry Service handles file operations.