Access the hidden engineering page of your ZTE router (often found at http://192.168.1 or similar manufacturer-specific URLs) and enable Telnet or SSH access. Step 2: Extract the File System Obfuscation Keys
ISP-customized firmware often changes default encryption passwords. If you received the router from an internet provider, standard open-source keys might not work without root shell access.
When dealing with recent ISP-customized firmware where the encryption keys have been changed, software-only tools may fail.
git clone https://github.com/mkst/zte-config-utility cd zte-config-utility pip3 install pycryptodomex python3 setup.py install --user
<InternetGatewayDevice> <WANDevice> <WANConnectionDevice> <WANPPPConnection> <Username>user@isp.com</Username> <Password>7B4F3A2C1E</Password> <!-- Often hex or base64 --> </WANPPPConnection> </WANConnectionDevice> </WANDevice> </InternetGatewayDevice> Decrypt Zte Config.bin
Let's outline a typical process for decrypting a config.bin file, assuming you have obtained one from your router.
If you are working with an older ZTE router model (released before 2018), the encryption key might be hardcoded and well-known. You can use a lightweight GUI tool called RouterPassView by NirSoft. Download and launch . Click on File > Open Router Config File . Select your config.bin file.
Modern ZTE gateways (like the H298A, H108N, or F660/F680 GPON ONTs) utilize AES-128-CBC or AES-256-CBC encryption.
By far, the most powerful and widely-used tool for this task is zte-config-utility , a collection of Python scripts primarily developed by Mark Street (mkst). It can decode, encode, and test various payload types across a vast range of ZTE routers. Alternative utilities include Ztedecode and ztef8648p ‘s configdec.py . Access the hidden engineering page of your ZTE
python zte_config_utility.py --encrypt config.xml new_config.bin Use code with caution.
Open the resulting XML in a text editor and search for keywords like AdminPassword , Username , or Password . Security Warning
If you run into issues during the decryption process, feel free to share your specific and the exact error message you are seeing so we can find the correct tool or script for your device. Share public link
For this model, the decryption process revealed: When dealing with recent ISP-customized firmware where the
Execute the script by passing your encrypted file as an argument. The utility will automatically attempt known hardcoded ZTE keys:
| Symptom | Likely Cause | Fix | | :--- | :--- | :--- | | Output is still gibberish after XOR | Wrong XOR key or compressed | Try key "ZTE" (case-sensitive) or "zte" . Check for Gzip header ( 1F 8B ). | | File starts with \x1F\x8B after decrypt | It’s Gzipped | Run mv decrypted.xml decrypted.gz then gunzip decrypted.gz | | Python script errors | Wrong padding or mode | Try -nopad option in OpenSSL or use pycryptodome with unpad . | | "Bad decrypt" error in OpenSSL | Wrong IV or Key | Extract the real key from a factory reset config. |
python zte_config_utility.py --infile config.bin --outfile decrypted.xml --mode decrypt Use code with caution. Step 4: Analyze the Output
openssl aes-128-cbc -d -in config.bin -out decrypted.txt -K 30313233343536373839616263646566 -iv 30313233343536373839616263646566 Use code with caution. Step 3: Decompress the Output