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Data breach

Repeated Daekyo Hacks Leak Data of About 650,000 Members

First reported · Last reported · 28 related reports

Daekyo was hacked in the same way in August 2024 and February 2025, leaking the personal data of about 650,000 members. Attackers exploited a vulnerability in an affiliate's website and used web shells and malware to reach the member database, and the leaked data included dates of birth and phone numbers. Daekyo neglected to analyse and block the activity even after being alerted to abnormal behaviour during the first attack, and the investigation found unnecessary direct access allowed between the affiliate's web server and the member database. The Personal Information Protection Commission imposed a fine of 3.255 billion won and a corrective order.

Key facts

Affected organisation
Daekyo
Incident type
Data breach
Occurred / detected
Not confirmed
Scale of damage
Personal data of about 650,000 members
Cause / method
Web shell and malware attack exploiting a vulnerability in an affiliate's website and a direct access path to the member database, and a neglected response to the warning about the first attack
Location
South Korea

If your data was exposed

Exposed dataPhone numberDate of birth

  1. Don’t tap links in texts, calls or emails that mention this incident and offer compensation, refunds or breach checks. Check directly on the organisation’s official website or app.
  2. If you’ve suffered harm, report it. Call 118 (no area code) for privacy violations, contact the police for financial losses, and apply for dispute mediation to seek compensation.Personal Information Infringement Report Centre ↗Korean National Police Agency cybercrime report ↗Personal Information Dispute Mediation Committee ↗

Timeline

  1. The leak of members' personal data, including dates of birth and phone numbers, came to light.
  2. The Personal Information Protection Commission fined Daekyo 3.255 billion won and issued a corrective order over the repeated leaks and inadequate safeguards.

28 related reports

The summary and key facts are written by AI from related reports and may contain errors. Check the original articles and the organisation’s official statements for accurate details.