By any chance, do you know when you last updated the firmware on both the router and IOT devices?
The router’s last firmware update was in November, and I try to keep that up-to-date whenever I get a notification.
The IOT devices are a different story. Some basically don’t get updates, some get automatic updates, and some are manual. It must have been weeks since the last time I knowingly received a firmware update for any of those devices, but that’s not to say that they didn’t get one without me knowing.
The way I’ve isolated the IOT devices should minimize any chance of a rouge device getting hacked and doing any kind of damage. None of the IOT devices can see each other, and they are isolated from my main network. Basically, they have access to the internet to perform their functions, and that’s it.