openstack-ansible-security/doc/source/developer-notes/V-38589.rst

Fixed by another STIG

Neither Ubuntu or openstack-ansible installs the telnet daemon by default. Running a telnet daemon isn't recommended under most situations, so the telnet server package will be removed from the system if it is installed.

The telnet server is removed by the Ansible tasks for V-38587, so no action is required here.