This firmware update addresses a few known vulnerabilities common to older DOCSIS 3.0 gateways. For a device that acts as the entry point to a home network, applying this patch is not just recommended—it is necessary for security hygiene.
Tenda often releases different hardware versions of the same model (e.g., V1, V2). Verify your version on the bottom sticker of the router and download the exact matching file. Tenda D305 Firmware Update
Tenda’s official Download Center