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fuso-cloud-storage-2026 · Disclosed 2026-07-22

扶桑電通: unauthorized access and impact

Cloud-storage credentials were abused; their acquisition route has not been identified. Shared files contained 26,489 customer/contact records potentially exposed.

Credentials

Outcome: Confirmed breach

Entry path and evidence

  • Reported fact

    Cloud-storage credentials were abused; their acquisition route has not been identified.

    [s1]第2報 §§1-3
  • Reported fact

    Shared files contained 26,489 customer/contact records potentially exposed.

    [s1]第2報 §§1-3

Timeline

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

Reported response

  • Reported fact

    Remediation includes MFA for external users and reviews of sharing permissions and accounts.

    [s1]第2報 §§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.

The undisclosed details must remain unknown.

Sources

  1. [s1] 扶桑電通 · Primary source

    扶桑電通：事故に関する公表資料 ↗

    Reviewed 2026-10-09