SHINDO3
TRUNK
TRUNK Inc.
Personal data records424records
POSSIBLE LEAKPostal address / Full nameAccount takeover · Contained
Open in the live monitor ▶- Disclosed
- Sep 1, 2026
- Leak
- Leak possible
- Type
- Account takeover
- Status
- Contained
- Security spend
- Not checked yet
- Compensation
- Not announced
What leaked
IdentityFull name
ContactAddress, Email address
Employment & HREmployer and other details
Not leaked
- The company does not hold credit card information
How many
- Personal data records 424 records
Cause
An employee's email account was accessed by a third party and suspicious emails impersonating the company and its staff were sent
Timeline
- First disclosure
Response
- Password reset
- Notified individuals
- Phishing warning
Strengthened the employee mailbox password and stopped the suspicious emails; contacting affected people and warning about impersonation emails
What you should do
- Don't open links in emails from this company. The apology email itself may be fake
- Watch for unexpected mail or invoices; your address is hard to change
- Check the company's notice to see if you're affected
Lessons for companies
- Report to the PPC: preliminary in 3–5 days, final in 30 (60 if malicious)
- Run red teaming and AI-assisted hardening, and publish how much you invest
Sources
- cybersecurity-jp.com News · Sep 9, 2026
- TRUNK Inc. Official notice · Sep 1, 2026