Confirmed

GMO Aozora Net Bank: 1,820 customer records leaked via contractor SocioFuture file sent to another bank

From 28 Nov 2024 contractor SocioFuture sent ostensibly cleared templates to another bank with customer data left in hidden sheets; discovered March 27, 2026 after the other bank noticed and disclosed April 3.

Last updated: 2026-11-09

Overview

1,820 records: account name, branch/account number, balances at a point in time, internal IDs, account-status notes and enquiry status. No address, phone, email or password.

Timeline

  1. Occurred
  2. Discovered
  3. Disclosed

Organization response

Per the notice, the organisation investigated and contained the incident, notified individuals and offered monitoring or protective resources.

What you can do

Be wary of emails, SMS or calls impersonating the organisation; do not open links or attachments or enter passwords or card details. Change reused passwords on other services.

Sources

  1. 業務委託先による他金融機関への当社お客さま情報流出に関するお詫びとご報告GMOあおぞらネット銀行株式会社 · 2026-11-09

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