エイチ・アイ・エス(HIS タイ現地法人)Data breach / unauthorized access incident
- Occurred on
- Unconfirmed
- Announced on
- October 7, 2026
- Severity
- AFinancial and HR records — information that easily translates into monetary damage.
- Scale
- 627 people
- Main impact
- Unauthorized access to the Thai local subsidiary's file server may have exposed passport numbers, expiration dates, alphabetic names, etc., of up to 627 customers who traveled to Thailand; passport images were confirmed leaked in some cases.
- Information involved
- Identity verification dataFull nameDate of birthHealth & medical data
- Cause / key point
- Unauthorized third-party access to the Thai subsidiary's file server (detected in 2025-12, revealed by an external expert investigation in 2026-02).
- Industry
- Transport & travel
- Listing / capital
- UnlistedParent company: エイチ・アイ・エス(東証プライム 9603)
HIS's Thai local subsidiary
- Last updated
- October 20, 2026
Stock price reaction to the disclosureエイチ・アイ・エス・親会社 / 東証プライム 9603
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CEO of MediaLeap Inc. Working on both sides of web advertising and web media since 2013; founded the company in May 2025.
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Attack method classification: Unauthorized access (method undisclosed)(Breached, but the technique was not identified or disclosed)
Read the Unauthorized access (method undisclosed) guide and national trends →