Zmm220 — Default Telnet Password

The ZMM220 platform (often used in devices like the F18 ) typically uses the following default credentials for Telnet access: Common Default Credentials Username root z1k2t3e4c5h root solokey root colorkey root swsbzkgn Key Login Scenarios

Because these devices are essentially small Linux-based computers, they run an embedded operating system. System administrators may want to access this OS via Telnet or serial connection for several legitimate reasons: Extracting raw user data or logs. Modifying localized wallpaper or audio files.

The algorithm shifts and multiplies the date components.

The presence of a Telnet service with a known default password allows an attacker to gain full root access to the device. Once logged in, an unauthorized user could: Extract Data: Download user fingerprint templates or access logs. Modify Settings: Change access rules or bypass security protocols. Deploy Malware: zmm220 default telnet password

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When prompted for a password, technicians typically rely on one of two methods: 1. Manufacturer Master & Engineering Passwords

If none of the above passwords work, consider these possibilities: The ZMM220 platform (often used in devices like

The ZMM220 is a widely used ZKTeco firmware platform found in biometric time attendance and access control terminals. Setting up, maintaining, or troubleshooting these devices often requires access to the underlying Linux operating system via Telnet. However, standard documentation rarely publishes the default root credentials, leaving administrators in a bind.

Clear audit trails to hide unauthorized entry.

Manually pull configuration files that aren't accessible via the standard UI. The algorithm shifts and multiplies the date components

If you discover a ZMM220 on your corporate network with default Telnet credentials, you have a .

The ZMM220 is not a specific product you would buy off a shelf; rather, it is a core hardware platform developed by ZKTeco, a global leader in biometric verification. It serves as the "brain" or the motherboard inside dozens of biometric products, including the (finger vein and fingerprint reader), iFace702 (facial recognition terminal), ProCapture-T (fingerprint access control), FV18 , and U1000 (UHF RFID standalone terminal).

In many older firmware versions (compiled between 2010 and 2018), standard embedded Linux conventions were used. If the device has not been hardened by a custom firmware update, the most common credential combinations include: root | Password: (Leave Blank / Press Enter) Username: root | Password: root Username: admin | Password: admin Username: root | Password: solorunner 2. Algorithmic and Dynamic Passwords

| | Typical Port | Access Level | |------------|------------------|-------------------| | PC management software | 4370 (proprietary) | Full management | | Web interface | 80 or 8080 | Configuration | | Device keypad | N/A | User management |