If the web interface rejects your password, the credential is hashed (MD5) inside the config file.
Device: ZTE F6640 (GPON ONT / Wireless Router)
Firmware versions tested: V1.0.0PxT2 (ISP variants)
Issue: Hardcoded / exclusive administrative password allowing full device control. zte f6640 admin password exclusive
You might wonder why you can’t just log in with admin/admin. ISPs lock these devices for two main reasons: If the web interface rejects your password, the