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daiki-suisan-2026 · Disclosed 2026-10-05

大起水産: unauthorized access and impact

Unauthorized app-system access was detected on September 15; the specific mechanism is undisclosed. Potential exposure covers 174,933 registered users. Passwords were held on a separate server and were unaffected.

Cause unresolved / undisclosed

Outcome: Confirmed breach

Entry path and evidence

  • Reported fact

    Unauthorized app-system access was detected on September 15; the specific mechanism is undisclosed.

    [s1]p.1 §1 / p.2 §2
  • Reported fact

    Potential exposure covers 174,933 registered users. Passwords were held on a separate server and were unaffected.

    [s1]p.1 §1 / p.2 §2

Timeline

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

Reported response

  • Reported fact

    Access controls and monitoring were strengthened; external specialists are investigating.

    [s1]p.1 §1 / p.2 §2

Evidence relevant to prevention

Insufficient evidence

Undisclosed entry or patch timing prevents an avoidability assessment. Inspect privileges, retrieval logs, retention and deployed configuration using the linked rules.

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

Unknowns and AI involvement

AI involvementUnknown

The reviewed disclosures do not establish attacker use of AI.

Confirmed exfiltration scope and the technical cause are undisclosed.

Sources

  1. [s1] 大起水産 · Primary source

    大起水産：事故に関する公表資料 ↗

    Reviewed 2026-10-09