To secure a ZMM220 terminal, administrators should move beyond simply "updating" the password. The following steps are recommended: Change the Root Password: Immediately replace with a complex, unique string. Network Isolation: Place biometric terminals on a dedicated
One of the most frequently cited "hardcoded" Telnet passwords for ZKTeco devices, particularly within their configuration files, is z1k2t3e4c5h . zmm220 default telnet password updated