If the device was previously configured, the default "admin" password has likely been changed for security.

💡 If you are locked out, you may need to perform a hardware reset using the "Reset" button on the back of the device or use the ZKAccess software to push a new password via USB/Network. Essential Security Steps After Login

For most ZKTeco devices running the Web 3.0 interface, the factory default login details are: admin Password: admin

If there is a "Super Admin" registered on the physical device, the web interface may be locked until that admin authenticates.