Nintendo has confirmed that around 160,000 Nintendo Network IDs have been illegally compromised.
The Nintendo Network ID had been required to access Nintendo Network services on Wii U or Nintendo 3DS, such as the Nintendo eShop or posting on the now-defunct Miiverse.
Earlier this week, users had started to report unauthorised access to their Nintendo Account which quickly resulted in Nintendo starting to investigate what had happened.
“We would like to provide an update on the recent incidents of unauthorised access to some Nintendo Accounts,” a statement from the company reads.
“While we continue to investigate, we would like to reassure users that there is currently no evidence pointing towards a breach of Nintendo’s databases, servers or services.
“As one action in our ongoing investigation, we are discontinuing the ability to use a Nintendo Network ID to sign in to a Nintendo Account. All other options to sign-in to a Nintendo Account remain available.
“As a further precaution, we will soon contact users about resetting passwords for Nintendo Network IDs and Nintendo Accounts that we have reason to believe were accessed without authorisation.
“In addition, we also continue to strongly encourage users to enable two-step verification for their Nintendo Account as instructed here: How to set-up two-step verification for a Nintendo Account.
“If any users become aware of unauthorised activity, we encourage them to take the steps outlined in the article about the Nintendo Account recovery process.
“During the investigation, in order to deter further attempts of unauthorised sign-ins, we will not reveal more information about the methods employed to gain unauthorised access.
“We apologise for the inconvenience and concerns caused to our customers, and we will continue working hard to safeguard the security of our users’ data.”