NTT Data announced on Nov 9 that the sign-up service for Sumitomo Life's standalone Vitality programs, which it builds and operates under contract, was accessed by a third party and personal data of about 80,000 users leaked [1]. Leaked data includes names, addresses, phone numbers, birth dates, emails or partially masked card numbers, and ITmedia reports about 1,000 users had card numbers leaked [1][2]. NTT Data says it confirmed the intrusion on Nov 2, blocked external access and suspended the service on Nov 3, and is still investigating the cause [1].
Outsourced sign-up system for Sumitomo Life Vitality wellness program breached; data of about 80,000 users leaked and service suspended
1 min read
- Disclosed
- Nov 9, 2026
- Occurred
- Nov 2, 2026
- Published
- Nov 11, 2026
- Last updated
- Nov 11, 2026
- Scale
- 80,000 people[1]
- CVSS basis
- Our assessment
- Attack vector
- Impact
- Data type
- Actor type
- Motivation
On this page
30-second summary
What happened
Who is affected
Industries mainly affected: Finance, Technology
What to do nowOur advice
NTT Data says it confirmed the intrusion on Nov 2, blocked external access and suspended the service on Nov 3, and is still investigating the cause [1]
Timeline
Technical details
Remediation
Vendor guidance
- 1Beware of impersonation calls and emails mitigate[1]
Do not give passwords or card details to suspicious callers or emails claiming to be NTT Data or Sumitomo Life.
References
Official / primary1
- [1]
Media1
- [2]
This site aggregates public information and is not security consulting advice. Test remediation steps before applying.