调查中

Daito Gas: Ryomo Systems intrusion may have exposed about 124,000 customers’ data

Ryomo Systems network intrusion may have exposed files with name/address/phone/billing IDs for customers from Nov 2023–Apr 2024 (~124,000); disclosed Sep 28, 2026. No bank/card data. Core customer system not breached.

最后更新: 2026-11-09

此内容以 English 显示。

概述

“About 124,000” → blank.

时间线

未知发生
2026-09-24发现
2026-09-28披露

组织应对措施

Per the notice, the organisation investigated and contained the incident, notified individuals and offered monitoring or protective resources.

用户应对建议

Be wary of emails, SMS or calls impersonating the organisation; do not open links or attachments or enter passwords or card details. Change reused passwords on other services.

信息来源

システムサービス提供事業者へのサイバー攻撃に伴うお客さま情報流出の可能性について大東ガス株式会社 · 2026-11-09