Présentation
Exfiltrated: "about 5.26 million" customer records (names, addresses, phones, emails, item details; about 490,000 with email), "about 50,000" delivery-address records and "about 4,100" merchant records (count blank). Amounts mentioned in the second report were not found exfiltrated. No card data or passwords.
Chronologie
- Survenue
- Découverte
- Divulgation
Intrusion announced.
Exfiltration confirmed.
Réponse de l’organisation
Per the notice, the organisation investigated and contained the incident, notified individuals and offered monitoring or protective resources.
Que faire ?
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
- 【第4報】「クロネコ代金後払いサービス」への不正アクセスに関する調査結果と今後の対応についてヤマトホールディングス株式会社 · 2026-11-09