已确认

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.

最后更新: 2026-11-09

此内容以 English 显示。

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.

时间线

2026-05-16发生
未知发现
2026-06-23披露

组织应对措施

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

用户应对建议

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.

信息来源

（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