Comment by phil21

If OP means Ethernet over HDMI it’s in the spec but as far as I’m aware has not been implemented in any mainstream chipsets anything actually uses. It’s one of those theoretical things that is somewhat surprising didn’t happen.

Overall it’s not a bad idea if devices need network connectivity. Have one central “box” get an Ethernet drop and it acts as a switch for your tv/xbox/playstation/media player/etc. The spec was made back when A/V receivers were more popular than they are now. It would cut down on a cable per device.

If OP means an exploit/hack then that’s a bit different.