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Confirmed breach

Bithumb data breach

KRSouth Korea

bitcoin and finance.biggo reported a data breach at Bithumb (South Korea) on 27 October 2026, and it has been confirmed. It affected 650 employees. Exposed: Email addresses, Phone numbers, Names, Internal data and Employee data.

Status
Confirmed breach
People affected
650 employees
Reported
27 October 2026
Who is affected
South Korea, European Union

What was exposed

  • Email addresses
  • Phone numbers
  • Names
  • Internal data
  • Employee data

How it happened

How
Software flaw el acceso se produjo a través de una vulnerabilidad en la infraestructura de la aplicación móvil source
Way in
internal mobile groupware, an in-house messenger channel supplied by an outside vendor The intrusion is said to have occurred through an in-house messenger channel supplied by an outside vendor. source

Sources

If Bithumb had your data

  1. Look for Bithumb’s own notice or letter: it should say what of yours was involved. Keep it.
  2. Expect scams that use your details: calls, texts or emails pretending to be Bithumb, your bank or the police. Never give codes or passwords, never approve a sign-in you did not start, never move money.

One email to confirm first. We use your address only for this alert, and one click deletes it.

More breaches in South Korea

  1. Daishin SecuritiesKRSouth Korea · 27 October 2026 Financial account and card detailsEmail addressesPhone numbers+4 38.5Kcustomers
  2. KB Kookmin BankKRSouth Korea · 26 October 2026 Credit information 2.2Kpeople
  3. Nol UniverseKRSouth Korea · 25 October 2026 Email addressesPhone numbersMember IDs+11 –not reported
  4. SpoonKRSouth Korea · 25 October 2026 Financial account and card detailsEmail addressesPhone numbers+1 –not reported
  5. Mirae Asset Life InsuranceKRSouth Korea · 25 October 2026 Personal credit informationPersonal and credit information –not reported

Every breach in South Korea →

From the data breach tracker: official notices, breach databases and the news, every fact with its source. Open data (CC BY 4.0) · How the tracker works · Found a mistake? Tell us and we correct it.