Seems like no one didnt get your question yet. I dont see why you are concerned about your home network security at home. Since most of the miners are only interested in harvesting more n more bitcoins no one didnt even think for a sec if the mining hardware compromises their own network security.
Because its not impossible, if he solo mine on his own node and he does not configure it properly. Its possible to allow incoming connection to actually run it like a Node. At that point people can get his IP and try to find a way in.
As such, it is possible to improve the security against such attack.
If he instead mine to let say ck's solo pool, then his IP is only revealed to ck, it would make it hard to know where the miners are in the first place.
The whole thing is so unlikely, to be honest.
The one time i saw it happen, someone left his network wide open (no router password for dropbear port) and got some BTC stolen(also no password encrypted wallet).
That would of been avoided if he changed his dropbear port and put a strong password(a weak one would of probably worked fine too) or just disabled it. Or you know, put a password on his wallet, the theft attempt would of been thwarted there, the attacker would need to be crafty to get the BTC out of that person's wallet.
This tends to happen to people that think "Can't happen to me."