八十二長野銀行 announced on 8 October that the email addresses of 35 customers may have been leaked after a staff member's email account was accessed without authorization. The incident occurred on the 7th and was disclosed on the 8th.
八十二長野銀行 announced on 8 October that a suspicious external email received by a staff member had led to unauthorized access to the staff member's email account by a third party, and that the email addresses of 35 customers and others may have been leaked.
The bank is currently checking whether any information other than email addresses may have been leaked, and no damage from misuse or other activity has been confirmed to date.
The bank contacted the affected individuals, blocked the account that had been accessed without authorization and notified the relevant authorities. It is analysing access logs with an external specialist to determine whether the information was viewed or obtained and to assess the scope of the impact. The bank said it would take thorough measures to prevent a recurrence.