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
- Detected 2026-11-02
- Disclosed 2026-11-09
- 7 days
Attack or cause
- Method
- [Intrusion]
- Impact
- [Data leak][Service outage]
- Entry point
- Unknown
Data exposed or at risk
Supply chain
- Organizations listed on this site
- 2
Services hit
Organizations involved
[Breached][Major]Tokyo, KotoInformation and communications80,000 leaked
NTT DATA Japan Corporation[Through a supplier][Major]Osaka, Osaka, ChuoFinance and insurance80,000 leaked
Sumitomo Life Insurance CompanyStandalone Vitality users are affected. About 1,000 have partly masked card numbers exposed, not full card numbers or health-activity data.
Sources
- [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][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