Aeon: unauthorized access to 42 group websites
Forty-two websites of 13 Aeon Group companies were accessed without authorization. Whether data leaked is under investigation.
Disclosed
2026-10-21
Organizations involved
13
Leaked or at risk
Unknown
Downtime
Unknown
Timeline
- Detected 2026-10-20
- Disclosed 2026-10-21
- 1 days
Attack or cause
- Method
- [Intrusion]
- Impact
- Entry point
- Unknown
- Affected, as stated
- 13
Data exposed or at risk
–
Organizations involved
[Breached][Moderate]Chiba, Chiba, MihamaWholesale and retail trade
Aeon Retail Co., Ltd.[Breached][Moderate]Chiba, Chiba, MihamaWholesale and retail trade
Aeon Co., Ltd.[Breached][Moderate]Ishikawa, KanazawaWholesale and retail trade
MaxValu Hokuriku Co., Ltd.
Sources
- [1][Official]イオングループの一部Ｗｅｂサイトへの不正アクセスによるシステムメンテナンスについてAeon · 2026-10-21
- [2][News]イオングループ13社の42サイトに不正アクセス 情報流出は調査中The Asahi Shimbun · 2026-10-21