Chubu Electric Power: unauthorized access to email and contacts
On 29 July, Chubu Electric Power received a tip from a third party, and its investigation found that credentials for some systems it uses had been misused to view about 2,400 employee emails and group contact data. Names, organizations, titles, emails and phone numbers of about 2,400 people at agencies, local governments and partners, and about 71,700 group employees and contractor staff may have leaked. Power supply and electricity and gas customer data were not affected.
Disclosed
2026-08-04
Organizations involved
1
Leaked or at risk
71.7K
71,700
Downtime
Unknown
Timeline
- Detected 2026-07-29
- Disclosed 2026-08-04
- 6 days
Attack or cause
- Method
- [Credential abuse]
- Impact
- [Data leak]
- Entry point
- Stolen credentials
Data exposed or at risk
Organizations involved
[Breached][Major]Aichi, Nagoya, HigashiElectricity, gas, heat and water71,700 leaked
Chubu Electric Power Co., Inc.
Sources
- [1][Official]不正アクセスによる情報漏えいの可能性についてChubu Electric Power · 2026-08-04