To secure your device, follow these steps to install the latest available firmware :
: Go to the Maintenance tab and select Update or Firmware Update .
Flashed bad router firmware :: Hardware and Operating Systems
: Always source firmware from the official ZTE support portal or your local ISP's website to ensure the file is authentic and not a malicious "patched" version from an unverified source.
Older versions of this router are susceptible to exploits that allow attackers to:
: Some firmware versions store backup files (like rom-0 ) in the web root, allowing remote attackers to read sensitive configuration data .
: Flaws in versions like W300V2.1.0f can allow non-administrators to change the admin password.