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Cybozu: newsletter recipient emails may have leaked via Cuenote FC breach

Possible data leak: Cybozu announced that on October 26 Ymir Link said emails and related data in its Cuenote FC environment were likely leaked—after saying on October 20 that Cybozu was out of scope.

最後更新: 2026-11-09

此內容以 English 顯示。

概述

Possible fields: newsletter recipient emails and similar. No count (count blank). No impact on data held in Cybozu services such as kintone. 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
2026-10-26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

ユミルリンク株式会社「Cuenote FC」への不正アクセスによる情報漏えいの可能性について（第一報）サイボウズ株式会社 · 2026-11-09