ライフカードData breach / unauthorized access incident
- Occurred on
- October 16, 2026
- Announced on
- October 28, 2026
- Severity
- AFinancial and HR records — information that easily translates into monetary damage.
- Scale
- 339,610 records
- Main impact
- Due to unauthorized access to the vendor's email delivery service, some of ライフカード's customer information may have been leaked; the number of affected contracts is 339,610. A portion of ETC card numbers affected is 60.
- Information involved
- Full nameEmail addressCard & payment data
- Cause / key point
- Unauthorized access resulting from exploitation of a program vulnerability in the vendor's system: support staff authentication credentials were obtained, an unauthorized program was installed, and data was exported from the database.About Exploitation of vulnerabilities
- Industry
- Finance & insurance
- Sources
- Last updated
- October 30, 2026
Where to go for this information
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Written & reviewed
Reviewed byYutaro SasaoFounder & CEO, MediaLeap Inc.
CEO of MediaLeap Inc. Working on both sides of web advertising and web media since 2013; founded the company in May 2025.
Review scope: cross-checking against primary sources (official and government announcements), verifying claims stay within the facts, and checking source attribution。Last reviewed:
Written by:Leak Watch editorial team (AI-assisted drafts verified against sources by the editorial team) · Reviewer profile · Request a correction
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Attack method classification: Exploitation of vulnerabilities(Breaking in through holes in software and devices)
Read the Exploitation of vulnerabilities guide and national trends →