Zmm220 Default Telnet Password Updated [upd]

The is a widely used hardware platform for biometric access control and time attendance terminals, primarily manufactured by ZKTeco. Security reviews indicate that while the platform has evolved, its default telnet and administrative credentials remain a significant point of vulnerability if not updated immediately after installation. Default Credentials & Telnet Access

Issue 1: “Authentication failed” using old zmm220 password

Cause: Firmware updated, but you’re trying the old credential.
Solution: Locate the device’s sticker. If missing, perform a hardware reset (15-second press) and then check the sticker again – note: a reset does not change the sticker password. zmm220 default telnet password updated

The default Telnet password for the ZMM220 has been updated to enhance security and prevent unauthorized access. This change affects all new devices shipped with the latest firmware, as well as devices that have been updated to the latest firmware version. The new default Telnet password is designed to be more secure and resistant to common password-guessing attacks. The is a widely used hardware platform for

The ZMM220 platform typically runs a Linux-based environment (often Kernel 3.0.8 on MIPS architecture). Multiple sources indicate that the following combinations are the most common default credentials for accessing the device via Telnet (Port 23): Username: root | Password: (blank/empty) Username: root | Password: solokey Username: root | Password: colorkey Username: root | Password: swsbzkgn Username: admin | Password: admin zmm220 default telnet password updated

Closing note

This change improves security but requires updates to operational processes. Audit deployment playbooks, update documentation, and adopt secure provisioning and access controls to avoid interruptions.

[ZMM220] # configure terminal
[ZMM220] # username admin password
New password: *************
Confirm: *************
[ZMM220] # service telnet disable
[ZMM220] # write memory
[ZMM220] # show running-config | include telnet
telnet disabled

Administrator Access: The most frequent default administrator password across many ZKTeco terminals is 1234.