This password is often found within the device's configuration files (typically ZKConfig.cfg ) and is distinct from the standard administrator passwords used for the web interface or on-device menu. Common Default Credentials for ZMM220 Devices
Research from security analysts and official documentation highlights several "default" values that often come pre-configured on ZMM220-based devices:
Security best practices dictate that you should update these default credentials immediately. Standalone Device - ZKTeco
Prior to mid-2024, the factory default credentials for the ZMM220 were widely documented in hardware manuals and online forums: