ZKTeco ZMM220 is a robust core board used in a wide variety of biometric fingerprint and access control devices, including the F18, iClock series, and various InBio controllers. If you are looking for the
default Telnet password, you may be attempting to troubleshoot firmware, recover a locked device, or perform security research. Common Default Telnet Credentials ZKTeco ZMM220
-based devices run a version of Linux (BusyBox) on a MIPS architecture. The most frequently reported default credentials for Telnet access (port 23 or 10086) include: Username: root Password: solokey
Other common passwords for root: colorkey, swsbzkgn, or no password (blank).
If the standard root logins do not work, researchers have also identified the following administrative combinations for related services: admin / 1234 administrator / 123456 888 / manage or manage / 888 How to Access the ZMM220 via Telnet
Identify the IP Address: Use the device menu or a network scanner to find the device's IP (often default 192.168.1.201).
Open a Connection: Use a Telnet client (like PuTTY or the Windows Command Prompt). telnet [IP_ADDRESS] Note: Some versions use non-standard ports like 10086.
Enter Credentials: Use the root / solokey combination first. Troubleshooting "Access Denied"
If you cannot log in using default credentials, it may be due to one of the following:
Unlocking the ZMM220: A Comprehensive Guide to Default Telnet Passwords and Secure Configuration
The ZMM220, a device from the reputable manufacturer ZTE, is a versatile and feature-rich piece of equipment designed to facilitate efficient and reliable network management. As with many network devices, accessing the ZMM220 for configuration and management often requires authentication through Telnet, a widely used protocol for remote access. However, for those unfamiliar with the device or its default settings, finding the correct Telnet password can be a challenge. This article aims to provide a detailed overview of the ZMM220's default Telnet password, along with essential information on securing your device and best practices for network management.
The ZMM220 is a powerful tool for network management, offering extensive capabilities for monitoring, managing, and troubleshooting network operations. While accessing the device via Telnet can be straightforward with the correct default password, it's crucial to prioritize securing your device and network. By changing default passwords, updating firmware, configuring access controls, and adhering to best practices for network management, you can ensure a secure and efficiently operating network. Always consult official documentation or manufacturer support for the most accurate and current information regarding your specific device.
The ZMM220 is a common hardware platform used in ZKTeco biometric devices, such as fingerprint and facial recognition terminals. If you are attempting to access the command-line interface via Telnet, the default credentials can vary depending on the specific firmware version or vendor customization. Common Default Telnet Credentials
For ZKTeco devices built on the ZMM220 platform, researchers and documentation suggest trying the following combinations: Username: root Passwords to try: solokey colorkey swsbzkgn (Leave blank) Alternative Administrative Credentials
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: Web Server (Web 3.0): User administrator, Password 123456.
Local Admin Menu: User ID 8888, Password 1234 or a time-based "Super Password". Gateway Login: Password admin. How to Connect Open your terminal or command prompt. Type telnet [Device_IP] (default port is usually 23). Enter the credentials from the list above.
Note: For many modern ZKTeco devices, Telnet is disabled by default for security. You may need to enable it through the device's system settings or by contacting ZKTeco Technical Support to adjust parameters like ServerType.
The ZMM220 is a common core board used in many ZKTeco biometric fingerprint readers and time-attendance terminals. If you are trying to access the device via Telnet (typically on port 23), you will likely encounter a login prompt for a Linux-based environment. Default Telnet Credentials zmm220 default telnet password
Based on documented research and common ZKTeco configurations, the most frequent default credentials for the ZMM220 board are: Username: root Password: z1k2t3e4c5h
Note: This specific string is often found in the configuration files (ZKConfig.cfg) of ZK devices. Other common vendor defaults to try: root : colorkey root : solokey root : swsbzkgn admin : admin Useful Technical Write-Up: Accessing the Shell
Accessing the ZMM220 shell is often part of a broader security assessment or "perverting" the device for custom use.
Network Discovery: Devices often listen on port 4370 (a proprietary UDP protocol for ZK software) and port 80 (Web interface). Telnet is frequently open but may be restricted depending on the firmware version.
Configuration Extraction: If you have access to the web interface but not the shell, researchers often download the backup configuration. By stripping the proprietary header from the backup file, you can sometimes extract a .tar archive containing ZKConfig.cfg, which stores the telnet password in plain text.
Environment: Once logged in via Telnet, you are typically dropped into a MIPS-based Linux kernel (often version 3.0.8). From here, you can navigate the /mnt/mtd/ or /system/ directories where user data and binary logic are stored. Security Warning
Many of these devices use unencrypted protocols (Telnet, HTTP) and hardcoded credentials, making them highly vulnerable to network-based attacks. It is strongly recommended to: Disable Telnet if not actively needed for maintenance.
Change the default web administrator password (often administrator / 123456). Isolate these devices on a dedicated VLAN.
Are you looking to automate data extraction from this device, or are you troubleshooting a connection issue? "MIPS" Pentesting - Google Groups
is a common Linux-based hardware platform used in biometric terminals, such as the F18 fingerprint reader. While these devices are primarily managed through proprietary software or a web interface, they often have a hidden Telnet service active on port 10086 for maintenance and development. Common Telnet Credentials
Security researchers and users have identified several default login combinations for ZMM220-based hardware. Because these are factory-set and often hardcoded, they represent a significant security risk if the device is exposed to a network. Frequently cited for ZKTeco Linux platforms Common on older ZKTeco/ZKSoftware units Used in various MIPS-based firmware versions Standard fallback for many embedded devices (No password) Some versions may allow direct login Alternative Management Passwords If you are looking for credentials to access the Web Interface Physical Device Menu rather than a Telnet shell, try these defaults: Web Interface (Port 80): administrator with password Device Admin Menu: , enter User ID , and use the default password Encrypted Config Files:
In some firmware versions, the Telnet password is stored as a variable $Telnet=z1k2t3e4c5h Security Considerations
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:
Use the device as a pivot point to attack other systems on your local network. User Manual - zkteco.me
ZKTeco ZMM220 is a common hardware platform used in biometric terminals like the F18, ProCapture, and UF200. For most of these devices, the Telnet service is either disabled by default or secured with factory-set credentials that are not meant for end-user access. Known Default Telnet Credentials If Telnet is enabled (often on port
), research and security advisories indicate the following common root-level credentials used across the ZMM220 platform: Frequently found on ZMM-based Linux builds Used in older ZKSoftware/ZKTeco firmware Common hardcoded password for developer access Generic fallback for some web and CLI interfaces 🛠️ Common Default System Passwords
If you are looking for general admin access rather than command-line (Telnet) access, these are the standard factory defaults: Standalone Device - Access Control - ZKTeco ZKTeco ZMM220 is a robust core board used
For the ZKTeco ZMM220 platform, which is often used in devices like the F18, there isn't a single universal "default" Telnet password as they vary by firmware and vendor. However, common default credentials for ZKTeco devices including the ZMM220 kernel are: User: root / Password: solokey User: root / Password: colorkey User: root / Password: swsbzkgn User: root / Password: z1k2t3e4c5h Other Common Credentials
If you are trying to access a web interface or local menu, try these standard defaults: Web Panel: administrator : 123456 Admin Menu: 8888 Local Administrator: 1234 ZKTeco Admin Password Reset
The ZMM220 is a core hardware platform and kernel used in many
biometric and access control devices, such as the InBio Pro series. While these devices typically rely on proprietary communication ports (like 4370) for software management, they often run a Linux-based operating system that may have an active Telnet service for low-level maintenance. Common Default Telnet Credentials
Security research and community findings suggest several credential sets that the manufacturer has historically used for Telnet access across ZMM220-based platforms: / Password:
— Frequently cited for many ZK-based embedded Linux systems. / Password:
— Another common legacy credential for various ZKSoftware modules. / Password: (No Password)
— Some firmware versions allow root access without a password, though this is less common in newer security-focused builds. / Password:
— Specifically noted in some technical teardowns of ZK hardware. Internal Configuration Variables
In some instances, the Telnet password may be stored as a variable within the device's internal configuration files. Security reviews on platforms like have identified instances where a variable is hardcoded or set to a default value such as z1k2t3e4c5h Other Related Default Passwords
For general administrative access (not Telnet) via the device's physical menu or web interface, the following defaults are standard: Web Panel Admin: Physical Device Admin: Super Password (Time-based):
A temporary password generated using the device's current display time. Security Considerations
Leaving Telnet active with default credentials poses a significant security risk, as it grants full shell access to the device's operating system. It is highly recommended to disable Telnet through the ZKTeco management software or change these passwords immediately upon deployment. through the ZKTeco management console? User Manual - zkteco.me
The default telnet password for the ZMM220 (often a Zigbee module or device used with IoT gateways, such as those from ZMD or similar brands) is typically admin or 123456.
However, exact credentials depend on the specific manufacturer and firmware. If you provide the full device brand (e.g., Xiaomi, Lonsonho, Moes, or a generic ZMM220 gateway), I can give a more precise answer.
For a common ZMM220-based smart gateway, the default login is often:
adminadmin or blank (empty) or 123456Safety note: 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. Username: admin Password: admin or blank (empty) or
If "zmm220" refers to a specific device or system:
Check the Manual or Documentation: The first step is always to consult the official manual or documentation that came with the device. Manufacturers often list default usernames and passwords in these resources.
Manufacturer's Website: Visit the manufacturer's website and look for a support or FAQ section. Sometimes, default login credentials are posted there, especially for commonly used devices or systems.
Common Default Credentials: If you know the type of device or system (e.g., network equipment, industrial control systems), you might try common default credentials. These can often be found online in databases or forums where users share this information for various devices.
Reset to Default: If you have physical access to the device and it's possible to reset it, this might restore the original default password. However, be aware that this can also reset other settings, potentially causing loss of configuration.
Contact Support: If all else fails, reaching out to the device's manufacturer support team can provide the necessary information. They can guide you through the process of resetting or retrieving the default password.
Before we hunt for the password, we must understand the prey. The ZMM220 is not a single consumer router from a major brand like Asus or Netgear. Instead, it is typically a reference design or a pre-certified wireless module based on the Ralink (now MediaTek) RT5350 or a similar MIPS-based SoC (System on a Chip).
Common platforms using ZMM220-like firmware include:
Because these devices often run stripped-down versions of Linux (such as OpenWrt 12.09 or Barrier Breaker), they occasionally ship with Telnet enabled on port 23 as a diagnostic tool. Manufacturers frequently forget to change or disable these defaults before shipping to consumers.
The default Telnet password for the ZMM220, like many network devices, is often required for initial setup and configuration. However, the specific default password can vary based on the firmware version, device configuration, and the network setup. As of the latest available information:
admin.ztezte or admin, but for the ZMM220 specifically, it is recommended to consult the official ZTE documentation or contact their support team for the most accurate and up-to-date information.It's essential to note that using default passwords poses significant security risks. Default passwords are widely known and can be easily exploited by malicious actors to gain unauthorized access to devices and networks.
If none of the above passwords work, consider these possibilities:
system or debug.The ZMM220 is a reference board design often used by Original Equipment Manufacturers (OEMs) for video surveillance and IoT devices.
root privileges. This gives an attacker complete control over the file system, allowing them to:
Assuming you have the device on your local network (or a direct Ethernet connection), follow this procedure:
Discover the IP Address:
00:0C:43 or 00:1C:BF.nmap -sn 192.168.1.0/24Test Telnet Connectivity:
telnet 192.168.x.x 23
If the port is filtered or closed, the manufacturer disabled Telnet in the production firmware.
The Login Attempt:
telnet (on Windows, enable Telnet client via "Turn Windows features on/off"; on Linux/Mac, use terminal).login: prompt, enter root.Password: prompt, try the credentials listed in Set 1–3 above.Success Indicator:
# or BusyBox v1.19.4.