If you are prompted for a login on a different interface (such as a web server or local console), these standard ZKTeco defaults may apply: User administrator , Password 123456 .
If the common password does not work, you can sometimes retrieve it from the device's backup:
If this is a device you own, check the sticker on the device or its manual. If you’re trying to access a device you don’t own, stop — unauthorized access is illegal.
Understanding the ZMM220 ZKTeco Terminal: Security and Access