SHINDO1

HALMEK up

HALMEK Holdings Co., Ltd.

Personal data1accounts

LEAK CONFIRMEDPassword / Login ID / usernameUnauthorized access · Investigating

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Disclosed
Sep 11, 2026
Detected
Sep 9, 2026
Detection to disclosure
2 days
Leak
Leak confirmed
Type
Unauthorized access
Status
Investigating
Security spend
Not checked yet
Compensation
Not announced

What leaked

CredentialsLogin ID, Password

How many

  • Employee admin-panel account 1 accounts

Who is affected

  • One employee

Cause

The ID and password an employee used to access the admin panel were stolen and used to access the admin panel

Timeline

  1. Detected
  2. First disclosure

Response

  • Password reset
  • Forensic investigation

Changed admin-panel passwords and is investigating the scope with outside experts

What you should do

  1. Change this password and every account that reused it now. Switch to a passkey where offered
  2. Expect targeted phishing posing as HR or interview contacts
  3. Check the company's notice to see if you're affected

Lessons for companies

  1. Passkeys or MFA for every account; monitor leaked credentials and rotate API keys
  2. Report to the PPC: preliminary in 3–5 days, final in 30 (60 if malicious)
  3. Run red teaming and AI-assisted hardening, and publish how much you invest

Sources