The default telnet password for devices using the board (typically fingerprint and biometric scanners manufactured by ZK Technology) has historically been discovered in the device configuration. Default Password Found z1k2t3e4c5h
In recent firmware updates, the default Telnet password for the ZMM220 has been changed to enhance device security. This update is part of an ongoing effort to strengthen the security features of the device and protect against potential threats. The new default Telnet password is more complex and robust, making it harder for unauthorized users to gain access to the device.
What's Changed?
Q: What if I lose Telnet access after the update?
A: Use the physical reset button to restore factory settings – but again, the default becomes the sticker password, not a universal one.
For devices using the ZMM220 board (commonly found in ZKTeco, Safescan, and similar biometric fingerprint readers), the default Telnet credentials often vary by firmware version or distributor. Common Default Telnet Credentials zmm220 default telnet password updated
If you’re managing biometric access control terminals like the ZKTeco ProCapture-WP , you’re likely working with the ZMM220 hardware platform
| Device Age / Firmware | Telnet Username | Default Password |
|----------------------|----------------|------------------|
| Pre-2024 (old firmware) | root | zmm220 (or blank) |
| Post-update (v2.3.1+) | admin | Printed on device label (12-character alphanumeric) | The default telnet password for devices using the
Malware families like Mirai and Gafgyt constantly scan for open Telnet ports using default password lists. The ZMM220 was identified as a target due to its widespread use and predictable credentials. Several high-profile DDoS attacks in 2023 were traced back to compromised ZMM220 gateways.
If you need access, do not search for hacked or leaked backdoor passwords. Instead, follow this professional recovery workflow: The new default Telnet password is more complex