已確認

J:COM: email addresses of J:COM NET and partner cable users leaked via KDDI mail platform breach

J:COM announced the intrusion on June 23 and reported the scope on July 6 (updated July 21). Unauthorised access affecting J:COM began on May 16, 2026.

最後更新: 2026-11-09

此內容以 English 顯示。

概述

J:COM NET email addresses of 2,473,191 people, partner cable-operator mail users 118,752 (corrected July 21), passwords of 1,257. Count left blank because the categories differ and are not summed. This stems from the intrusion into KDDI's mail platform for ISPs (recorded separately); the figure is a subset of KDDI's total and must not be added to it.

時間軸

2026-05-16發生
不明發現
2026-06-23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

（更新）当社メールサービスに対する不正アクセスの発生についてJCOM株式会社 · 2026-11-09