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[Contained][Severity: Major][Intrusion]

NTT DATA: Sumitomo Life Vitality contractor-system breach exposes about 80,000 users’ data

A breach of standalone Vitality application systems exposed about 80,000 users’ data, including masked card numbers for about 1,000. Activity data is excluded.

Disclosed

2026-11-09

Organizations involved

2

Leaked or at risk

80K

80,000

Downtime

Unknown

People affected or at risk

80K

80,000

Affected plans and data

Unauthorized access was identified on 2 November in application services built/operated by NTT DATA, with external access blocked on 3 November. About 80,000 current/former users of standalone Vitality Trial/Corporate and Vitality Smart, including employee-benefit plans, are affected. Names, addresses, phones, birth dates, email or partly masked card numbers leaked. Card-number exposure concerns about 1,000 people; the notices do not report full card-number exposure. [1] [2]

Insurance contracts, insurance-linked Vitality and activity data such as step counts are excluded. Since 3 November, affected plans’ new applications, Smart self-service cancellation/card changes and corporate benefit administration are stopped. The Vitality app and Vitality insurance applications/procedures are unaffected. Investigation and safety checks for reopening continue; misuse or internet publication is not confirmed. [1] [2]

Timeline

  1. Detected 2026-11-02
  2. Disclosed 2026-11-09
  3. 7 days

Supply chain

Services hit

Open in service search

Organizations involved

Open in organization search

Sources

  1. [1][Official]当社受託システムにおける個人情報漏えいについてNTT DATA · 2026-11-09
  2. [2][Official]業務委託先システムへの不正アクセスによるお客さま情報漏えいに関するお詫びとお知らせSumitomo Life Insurance Company · 2026-11-09