Overview
“About 1,600” → blank.
Timeline
- Occurred
- Discovered
- Disclosed
Organization response
Per the notice, the organisation investigated and contained the incident, notified individuals and offered monitoring or protective resources.
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
- 外部委託先への不正アクセスによるお客様情報漏えいについてヤマハ株式会社 · 2026-11-09
- 外部委託先への不正アクセスによるお客様情報漏えいについて（PDF）ヤマハ株式会社 · 2026-11-09