Nintendo has been hacked and only the Nintendo accounts that are connected to a Network ID should be affected.
I connected a Network ID on my 3ds… Could it be hacked now? Or just Nintendo accounts?
I have 2fa on my Nintendo Account but it doesn't exist on Network ID.
I regularly change my password. Do I still have to worry about hacking my regular Nintendo Network ID on my 3ds?
You can look at the last login attempts somewhere, then you are certain
Here: accounts.nintendo.com/login_history
The best thing to do is change your password, remove the payment option and activate the 2 security levels.