Zmm220 Default Telnet Password -

Product: ZMM220 Platform / Embedded Devices Service: Telnet (Port 23) Vulnerability Type: Use of Default/Hardcoded Credentials CVSS Score: 9.8 (Critical)

If none of the above passwords work, consider these possibilities:

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

The ZMM220 is a hardware platform developed by ZKTeco for biometric access control and time attendance devices. While these devices often have a variety of "default" passwords for different interfaces (like the physical keypad or web panel), identifying the telnet password is often a critical step for system administrators and security researchers. Default Telnet Credentials

For many devices based on the ZMM220 platform, the telnet service (typically running on port 23 or sometimes 10086) uses the following default credentials: Username: root Common Passwords:

z1k2t3e4c5h (Discovered in configuration file headers of some ZK-based devices) solokey colorkey swsbzkgn Other Common Default Passwords

If the telnet-specific passwords do not work, the platform often uses standardized defaults for other access points, which may sometimes be shared with the shell: ProCheckUp/SafeScan - GitHub

Based on technical documentation and community reports for ZK Teco devices using the ZMM220 core board, the default telnet password is often embedded in the system configuration.

The most commonly reported default telnet password for the ZMM220 is:z1k2t3e4c5h Key Connection Details Username: Often root or admin.

Port: The standard Telnet port is 23, but these devices often use port 4370 for proprietary communication protocols.

Web Interface: If you cannot access Telnet, try the web interface (port 80) where the default credentials are often admin / 123456 or administrator / 1234. How to Find/Verify the Password

If the common password does not work, you can sometimes retrieve it from the device's backup: zmm220 default telnet password

Download a backup of the configuration from the web interface.

Extract the backup archive (it may require removing a proprietary header). Locate the ZKConfig.cfg or Config.cfg file.

Search for the line starting with $Telnet= to see the specific password set for your firmware version. Not working with new device - guidance needed #14 - GitHub

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

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 Product: ZMM220 Platform / Embedded Devices Service: Telnet

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:

Safety 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.

(a ZKTeco core board used in biometric terminals) typically uses the following default credentials for Telnet and administrative access: If you are accessing the device menu

directly or through the SDK, the default administrator password is often www.zkteco.com.br Connection Steps Network Setup:

Ensure your PC is on the same subnet as the ZMM220 board (standard default IP is often 192.168.1.201 Terminal Client: Use a client like or the native Windows command prompt. telnet [Device_IP] telnet 192.168.1.201 Enter the credentials provided above. Important Notes Case Sensitivity: Credentials like are strictly lowercase.

Telnet is an unencrypted protocol. It is highly recommended to change these defaults immediately upon login to prevent unauthorized access to the biometric data or system configuration. Manufacturer Support: If these do not work, consult the specific ZKTeco Support

page for your hardware model, as some firmware versions may have unique localized defaults. Installation & User Guide - ZKTeco

Enter the administrator password. (The default password is 1234.) www.zkteco.com.br User Manual - ZKTeco ☺Note: The default administrator password is 1234. www.zkteco.com.br Installation & User Guide - ZKTeco

Enter the administrator password. (The default password is 1234.) www.zkteco.com.br User Manual - ZKTeco ☺Note: The default administrator password is 1234. www.zkteco.com.br

Subject: ZMM220 Default Telnet Credentials

Device Model: ZMM220 (4G LTE CPE / Modem) Safety note: If this is a device you

Regarding the default Telnet access for the ZMM220:

Note: Telnet is typically disabled by default on recent firmware for security reasons. To enable it:

Security Warning: If your device is connected to the internet with default credentials, change the admin password immediately and disable Telnet unless explicitly required. Leaving default Telnet access active exposes the device to remote takeover.

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

Assuming you have the device on your local network (or a direct Ethernet connection), follow this procedure:

telnet 192.168.x.x 23

Shipping a product with the ZMM220 reference design?

Deduced from leaked configuration scripts from a specific OEM in Shenzhen.

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.