[Mario Kart 8 Deluxe] Here's more info on the security vulnerability that was fixed in version 3.0.3. (The bug was responsibly disclosed to Nintendo and the researchers are now allowed to talk about their findings.) A full write-up is available here: 🔗 github.com🐦 original post

Basically, a hacker could've remotely crashed a Switch running Mario Kart 8 Deluxe. It could've been worse if it was paired with a (theoretical) second bug.