Sony Network Communications: a third party obtained So-net user IDs and passwords and changed the email addresses of some customers without their consent

1. 2025-07-11

   It announced that it had confirmed cases where some customers' So-net email addresses were changed without their consent after a third party obtained user IDs and passwords. It stopped accepting email address changes to protect customer accounts. [1] [2]

2. 2025-08-08

   It posted a follow-up announcing that from August 25 the mail user name could be changed once for free and not again. [1]

No count was published. No leak of IDs, passwords or other data from the company was confirmed. It asked customers to check their login history and change their passwords if they found access they did not recognise. [1] [2]