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Community Network Co., Ltd.

Email addresses236,323records

POSSIBLE LEAKPhone number / Name reading (kana)Unauthorized access · Contained

Open in the live monitor ▶
Disclosed
Sep 12, 2025
Detected
Sep 5, 2025
Detection to disclosure
7 days
Leak
Leak possible
Type
Unauthorized access
Status
Contained
Security spend
Not checked yet
Compensation
Not announced

What leaked

ContactEmail address, Phone number
IdentityName in katakana
Account dataMember number
CredentialsLogin ID

How many

  • Email addresses 236,323 records
  • Member records including names and phone numbers 127 records

Who is affected

  • Members and users

Cause

An outside party compromised a server; personal data at some sites using the ticket system may have been viewed or leaked

Timeline

  1. Detected
  2. Date of the Security NEXT report
  3. Reported to authority
  4. Police consulted

Response

  • Notified individuals
  • Phishing warning

What you should do

  1. Don't open links in emails from this company. The apology email itself may be fake
  2. Treat refund or apology calls and texts as scams. Call back only on the number from the official site
  3. 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