When establishing a remote terminal connection to a ZMM220 device, the login interface typically prompts you with a Linux kernel banner (e.g., Welcome to Linux (ZMM220) for MIPS Kernel 3.0.8 ). Security researchers and network administrators have compiled several credential profiles that work out of the box across various firmware versions: root | Password: colorkey Username: root | Password: solokey Username: root | Password: swsbzkgn Username: admin | Password: admin Username: manage | Password: 888
Through the Linux shell, malicious commands can trigger the onboard relays, instantly unlocking physical secure doors without leaving an entry audit log in the management software.
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If you are managing these devices, it is critical to move beyond factory settings:
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 zmm220 default telnet password
who --logged-in
If you cannot log in using default credentials, it may be due to one of the following:
Security research and community findings suggest several credential sets that the manufacturer has historically used for Telnet access across ZMM220-based platforms: / Password:
Telnet transmits all data—including usernames and passwords—in plain text. Anyone monitoring network traffic with a packet sniffer (like Wireshark) can easily intercept your credentials. When establishing a remote terminal connection to a
A deep rumble echoed through the pipes. The pressure gauge on the wall began to fall.
Restrict traffic so that only the dedicated access control management server can communicate with the devices.
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
An attacker who gains access to the local Wi-Fi or a corporate LAN segment can scan for port 23 (Telnet). If they authenticate using root / solan , they control the device. This link or copies made by others cannot be deleted
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.
Do you have configured on your current network?
Even if the ZMM220's credentials were known, the very idea of relying on any default login is a significant security red flag. This is a critical lesson for all network-connected devices.
Depending on the specific firmware version, modification by a local distributor, or the manufacturing date, the default password might vary. If the primary credential set does not work, administrators commonly test these variations: root | Password: (Blank / No password) Password: admin Password: zkteco Password: 123456 💻 How to Connect to ZMM220 via Telnet
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