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South Korea fines Duo 1.21bn won over 420k data breach

4/23/2026

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Summary

Story summary

The Personal Information Protection Commission fined Duo 1.21 billion won for a breach exposing 420,000 members’ data.
Hackers accessed Duo’s database in January 2025 and stole details such as weight and blood type.
The commission said Duo kept ID numbers and passwords and failed to delete data of nearly 300,000 members older than five years.
Duo said it respects the findings, regrets the breach, and called the attack extremely hard to detect.

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Story summary

The Personal Information Protection Commission fined Duo 1.21 billion won for a breach exposing 420,000 members’ data.
Hackers accessed Duo’s database in January 2025 and stole details such as weight and blood type.
The commission said Duo kept ID numbers and passwords and failed to delete data of nearly 300,000 members older than five years.
Duo said it respects the findings, regrets the breach, and called the attack extremely hard to detect.