https://en-americas-support.nintendo.co ... a_id/49396Nintendo Network ID Sign-In Discontinuation to Nintendo Account
Applies to: Nintendo Account
We would like to provide an update on the recent incidents of unauthorized access to some Nintendo Accounts.
While we continue to investigate, we would like to reassure users that there is currently no evidence pointing toward 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 authorization.
In addition, we continue to strongly encourage users to enable 2-Step Verification for their Nintendo Account.
If any users become aware of unauthorized activity, we encourage them to follow the steps in the Nintendo Account recovery process.
During the investigation, in order to deter further attempts of unauthorized sign-ins, we will not reveal more information about the methods employed to gain unauthorized access.
We apologize for the inconvenience and concerns caused to our customers, and we will continue working hard to safeguard the security of our users’ data.
Yo creo que es más porque Nintendo usa servicios de terceros como vincular cuentas de Twitter o Facebook. Al menos yo no uso eso y no me ha llegado nada. Pero igual será improtante estar atentos... aunque no me da confianza el logeo de dos pasos, pues usa otro servicio externo.