Ransomware Attack Disrupts Keio Railway Systems; Nearly 60,000 Member Emails May Be Exposed
Summary
A ransomware attack disrupted some Keio Electric Railway operational systems, but train services were unaffected. The company warned that email addresses for nearly 60,000 members may have been exposed.
Key points
- Keio Electric Railway was targeted in a ransomware attack.
- Some operational systems were disrupted, but train services were not affected.
- The company warned that email addresses belonging to nearly 60,000 members may have been exposed.
- The incident was reported on September 25, 2026.
Article Details
- Victim Organization
- Keio Electric Railway
- Victim Domain
- keio.co.jp
- Incident Type
- Ransomware attack
- Disclosure Date
- 2026-09-25
- Data Types Exposed
- Email addresses
- Affected Records
- Nearly 60,000 member email addresses may have been exposed.
- Operational Impact
- Some operational systems went offline; train services were not affected.
- Claim Status
- confirmed