To install the software update, you must log into the local gateway portal. Open a web browser on your connected computer.

: The ZTE F680 has gone through multiple hardware revisions (e.g., V4, V6, V9). Installing software built for a V4 unit onto a V9 unit will cause a hard brick. Match your file strictly to the sticker on the bottom of your device.

The ZTE F680 is often locked by Internet Service Providers (ISPs). An update may not be available directly to end users. Performing an incorrect update can brick the device. Proceed at your own risk.

| Vulnerability | Affected Version | Fix | | :--- | :--- | :--- | | | ZTE F680 V9.0.10P1N6. An attacker could use this flaw to tamper with program parameters and perform unauthorized operations. | Update to a version beyond V9.0.10P1N6. | | Cross-Site Scripting (XSS) (CVE-2022-23136) | ZTE ZXHN F680 V6.0.10P3N20. An attacker could modify the gateway name to trigger an XSS attack on the admin page. | Update to a firmware version newer than 6.0.10P3N20. |

Updating the software or firmware on your dual-band GPON gateway optimizes network stability, patches security vulnerabilities, and resolves slow Wi-Fi performance.

: The most reliable source for official firmware is the ZTE support website. Search for your specific model, ZXHN F680 (note the exact version, e.g., V2.0, V5.0, V6.0), as support for some older versions may have ended.

and enter http://192.168.1.1 in the address bar.

button on the back for 10 seconds using a thin object like a paperclip. Dual Storage

: Although not always necessary, it is a good practice to back up your current router settings before a major update. This way, if the update resets the device to factory defaults, you can quickly restore your preferred configurations (like Wi-Fi name and password).

Complete Guide: How to Update and Install Firmware on the ZTE F680 Router

| Username | Password | | :--- | :--- | | admin | admin | | user | user | | admin | password | | support | support |

This is the most straightforward method, relying on the router's built-in update feature.

, but you should check the label on the bottom of your router for the specific credentials assigned to your device. Step 2: Choose Your Update Method Option A: The Easy Way (Auto-Check)

), multiple Gigabit Ethernet ports, and VoIP services. To ensure your device runs efficiently, maintains security, and provides optimal performance, keeping the updated is essential.