SHINDO3

Fuso Dentsu Co., Ltd.

Unauthorized accessSize not disclosed

POSSIBLE LEAKInvestigating

Open in the live monitor ▶
Disclosed
Aug 13, 2026
Detected
Jul 15, 2026
Detection to disclosure
29 days
Leak
Leak possible
Type
Unauthorized access
Status
Investigating
Security spend
Not checked yet
Compensation
Not announced

What leaked

UnspecifiedSome information including personal data

Cause

A third party accessed a cloud storage folder used to share information with outside partners

Timeline

  1. Detected
  2. Reported to authority
  3. First disclosure

Response

  • Blocked the entry point
  • Revoked credentials
  • Forensic investigation

Suspended access to the shared folder, deleted the accounts involved and checked access logs; investigating the cause with outside help

What you should do

  1. Check the company's notice to see if you're affected

Lessons for companies

  1. Report to the PPC: preliminary in 3–5 days, final in 30 (60 if malicious)
  2. Run red teaming and AI-assisted hardening, and publish how much you invest

Sources