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Data breach

Apartner users’ mobile phone number file exfiltrated twice

First reported · Last reported · 11 related reports

On October 23, an outside party gained unauthorized access to Apartner’s data export feature and exfiltrated a file containing some users’ mobile phone numbers twice. Operator Dukkubisesang discovered the incident on November 4 and notified users of the breach on November 6. The number of affected users was not disclosed, and the file did not contain names, residential addresses, passwords, or financial information.

Key facts

Affected organization
Dukkubisesang
Incident type
Data breach
Occurred / detected
2026-10-23
Scale of damage
Mobile phone numbers of some users; number of affected users not disclosed
Cause / method
An outside party gained unauthorized access to the data export feature and exfiltrated a file
Location
South Korea

If your data was exposed

Exposed dataPhone number

  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 organization’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 Center ↗Korean National Police Agency cybercrime report ↗Personal Information Dispute Mediation Committee ↗

Timeline

  1. An outside party exfiltrated a file containing users’ mobile phone numbers twice.
  2. The operator discovered the personal data breach.
  3. Dukkubisesang notified users of the personal data breach.

11 related reports

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