Up to 300,000 Nintendo Accounts were accessed.
"Nintendo has revealed that an additional 140,000 user accounts were accessed by unauthorized means back in April. Previously, the company had said that only 160,000 accounts were affected and was slow to acknowledge the problem at the time.
The news will come as a worry to those who are concerned about the security of their Nintendo Account and Nintendo Switch, although Nintendo stressed that less than one percent of all Nintendo Network ID (NNID) users were affected by the breach.
The security breach saw unauthorized users hijack vulnerable accounts using illegally obtained NNID information (which was required to make purchases on the Wii U and Nintendo 3DS). To make matters worse, some hackers took advantage of users' saved PayPal details to purchase various in-game currencies, such as Fortnite's VBucks."