Team Xecuter (TX) released jailbreaking software SX OS for Nintendo Switch that enables gamers to play pirated games on the gaming console. SX OS uses anti-piracy measures in its own code that can brick your Switch if it detects an attempt to crack or free distribute its software online. UK-based vulnerability researcher Mike Heskin has reversed engineered the SX OS code, intentionally triggered the bricking feature, and eventually ended up bricking his own Switch with a randomly generated password. However, the odds are so low that it is very unlikely that anyone will be affected by this (unless you’re messing with voltage or time-sensitive stuff)
Source: https://thehackernews.com/2018/06/nintendo-switch-jailbreak.html