Decrypt Zte Config.bin

Scenario: You bought a used ZTE F680 from a surplus store. The previous owner did not factory reset it. You need to access the web interface, but the default admin/admin doesn’t work.

Several open-source tools exist. The most common is ztecfg.py.

Steps:

If it fails: The key may be specific to your router model. You may need to extract the key from the router's firmware.

The exact method varies by firmware version, but historically: Decrypt Zte Config.bin

Common constants observed in reversing:

If you know the key (often "ZTE123456" or your router’s MAC address), you can use OpenSSL: Scenario: You bought a used ZTE F680 from a surplus store

openssl enc -d -aes-128-cbc -in config.bin -out config.xml -K 5a5445313233343536 -iv 00000000000000000000000000000000

(Note: 5a5445313233343536 is hex for "ZTE123456")