It is only as risky as it is attackable.

If you use it internally and segment things so that only your server can reach it, then it is essentially impossible to attack.

Then on the other hand, is your network secure? How easy would it be to get in? Where is the weak point? You have to remember that this is a home. It is not likely to be a large target and generally as long as you have any kind of intelligence you will be fine.

So realistically, you will be fine as long as you don’t host it out to the internet in any ways.