Unnecessary services increase the attack surface of a system. Some of these services may not support required levels of authentication or encryption or may provide unauthorized access to the system.
To Fix this Uninstall "TFTP Client" from the system.
Run "Programs and Features".
Select "Turn Windows Features on or off".
De-select "TFTP Client".
STIG: Server: https://www.stigviewer.com/stig/windows_server_2019/2020-06-15/finding/V-93389