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chubu-business-credentials-2026 · Disclosed 2026-08-04

中部電力: unauthorized access and impact

Business-system credentials were abused; no intrusion evidence was found for power-supply or customer systems. Potential exposure includes about 2,400 messages and contacts for about 2,400 external and 71,700 group-related people.

Credentials

Outcome: Confirmed breach

Entry path and evidence

  • Reported fact

    Business-system credentials were abused; no intrusion evidence was found for power-supply or customer systems.

    [s1]§§1-3
  • Reported fact

    Potential exposure includes about 2,400 messages and contacts for about 2,400 external and 71,700 group-related people.

    [s1]§§1-3

Timeline

  1. Disclosure date established by the reviewed notice. [s1]

Reported response

  • Reported fact

    Credentials were revoked and the attack source blocked.

    [s1]§§1-3

Evidence relevant to prevention

Operational controls to inspect

Inspect the disclosed configuration, authorization or operational issue. Verify applicability and retain evidence of behavior after remediation.

Editorial assessment; not a determination of liability. [s1]

Unknowns and AI involvement

AI involvementUnknown

The reviewed disclosures do not establish attacker use of AI.

Message count and contact-person counts represent different scopes and cannot be added as affected people.

Sources

  1. [s1] 中部電力 · Primary source

    中部電力：事故に関する公表資料 ↗

    Reviewed 2026-10-09