LawsonMail server

1MinorInvestigatingAnnounced

Lawson's mail server was misused to send an estimated 700,000 suspicious English emails. No data leak, data center intrusion or malware was confirmed at the time of the notice.

This incident was imported from a dataset that compiles public announcements, and we are still checking it against the sources. Counts and causes will be updated after the check. Sources are in Japanese.

Cause
Email account compromise
Occurred
2026-09-25 – 2026-09-27
Sector
Retail & e-commerce
Operational impact
None

Sources

  1. 当社メールサーバーの不正利用による不審メール送信についてwww.lawson.co.jp · Published 2026-10-01(opens in a new tab)