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ColdRecon / Breach Radar / Keio Corporation
Breach Record

Keio Corporation

DISCLOSED 2026-09-29 · RANSOMWARE · RANSOMWARE

Keio Corporation announced on September 26 that servers at its group companies were hit by a ransomware attack, causing system disruptions including card payment issues at retail stores.

The record

What we know

Disclosed
2026-09-29
Attack vector
Ransomware
Sector
Retail
Country
Japan
RANSOMWARE
Sources

Cited reporting

↗ finance.biggo.com
Similar vector · recent

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