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Data breach

File of Apartner users’ mobile numbers exfiltrated twice

First reported · Last reported · 11 related reports

On 23 October, an external party gained unauthorised access to Apartner’s data export function and exfiltrated a file containing some users’ mobile numbers on two occasions. Operator Dukkubisesang became aware of the incident on 4 November and informed users of the breach on 6 November. The number of affected users was not disclosed, and the file contained no names, residential addresses, passwords or financial information.

Key facts

Affected organisation
Dukkubisesang
Incident type
Data breach
Occurred / detected
2026-10-23
Scale of damage
Mobile numbers of some users; number affected not disclosed
Cause / method
Unauthorised access to the data export function and file exfiltration by an external party
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 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. An external party exfiltrated a file containing users’ mobile numbers on two occasions.
  2. The operator became aware of the personal data breach.
  3. Dukkubisesang informed 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 organisation’s official statements for accurate details.