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Resona Bank: customer emails may have leaked via Cuenote FC breach

Possible data leak: Resona Bank, jointly with Saitama Resona and Kansai Mirai, announced on October 27 that Ymir Link's Cuenote FC breach likely exfiltrated group customer data used for email delivery.

最後更新: 2026-11-09

此內容以 English 顯示。

概述

Possible fields: emails and delivery management numbers. No account numbers, PINs, passwords or cards. Count under review (count blank). This stems from the Ymir Link Cuenote FC intrusion (recorded separately); the figure is a subset of the vendor scope and must not be added to it.

時間軸

不明發生
不明發現
2026-10-27公布

組織應對措施

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

使用者應對建議

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.

資訊來源

外部委託先への不正アクセスによるお客さま情報の漏えいの可能性について株式会社りそな銀行・株式会社埼玉りそな銀行・株式会社関西みらい銀行 · 2026-11-09