Overview
Up to 15,128 records (count blank): administrator names, company names, emails and locations, plus user IDs and hashed passwords. Access may have begun around the night of October 30.
Timeline
- Occurred
- Discovered
- Disclosed
Organization response
Suspended the service, is investigating with external specialists and plans to contact affected users.
What you can do
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.
Sources
- 不正アクセスによる「情報セキュリティ理解度チェックサービス」からの利用者個人情報漏えいの恐れに関するお知らせ（第一報）特定非営利活動法人日本ネットワークセキュリティ協会 · 2026-11-09