: Known to contain improper change control vulnerabilities (CVE-2018-7357, CVE-2018-7358). Version 3.5.0_EG1T4_TE / EG1T5_TE

However , a bad firmware update can turn your H168N into an expensive paperweight.

: This model has been noted for several CVE-listed issues, including improper access control (CVE-2021-21730) and information leak vulnerabilities (CVE-2021-21735) in specific firmware builds Update Process

The best place to find firmware for your device is on the official ZTE website or through your ISP's support pages. Since PTCL uses this device, you might find specific firmware versions on PTCL's official website or through their customer support.

The changelog read like a miracle:

Firmware for the ZTE ZXHN H168N is crucial as it controls the device's operation, dictating how it manages connections, handles data transmission, and provides various network services. Updating the firmware can enhance device performance, improve security, fix bugs, and add new features.