Vizio firmware version is widely considered a "dead-end" or "bridge" update for older Vizio D-Series smart TVs (like the D40f-G9). While it was intended to stabilize older models, it has become a source of major frustration for users trying to access modern streaming features. The Good: Stability for Basic Use
If you’re experiencing issues on 4.25.11, report them via the Vizio Support app built into your TV (under “Send Feedback”). Vizio has been unusually responsive to user reports since the 4.25.x branch. vizio firmware 4.25.11
Updated from 2022-07-05 to 2023-02-05 – closes CVE-2023-2163 (a DHCP stack overflow that allowed local network RCE). Vizio firmware version is widely considered a "dead-end"
If you are stuck on this version and cannot update further through the menu, you may need to visit the VIZIO Firmware Search and enter your serial number to see if a newer manual download is available. Vizio has been unusually responsive to user reports