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Bithumb breach exposed data for 844 customers, funds unaffected

Intrusion into DaouOffice groupware lasted about one hour on Oct 27.

6,444 customer records held, 5,600 stayed encrypted; 715 staff also exposed.

First reported Oct 29, 2026, 07:38 UTC

Source reports

  • Bithumb internal system hack reportedly leaks personal data of hundreds of customers Source — ahboyashreads, Oct 29, 2026, 07:38 UTC
  • Bithumb internal system hack reportedly leaks personal data of hundreds of customers Source — Rickler Feed, Oct 29, 2026, 07:38 UTC
  • Bithumb Details Internal System Breach: 6,444 Customers and 715 Employees Compromised South Korea's second-largest crypto exchange, Bithumb, disclosed that an unauthorized external intrusion into its internal corporate groupware (DaouOffice) for approximately one hour on October… — @WuBlockchain (X), Oct 29, 2026, 09:41 UTC
  • Bithumb says hackers breached its internal work app, leaking personal data of 844 customers and 715 staff, including ID copies Source — ahboyashreads, Oct 29, 2026, 09:47 UTC
  • Korean exchange Bithumb says hackers breached its internal work app, leaking personal data of 844 customers and 715 staff, including ID copies Source — Rickler Feed, Oct 29, 2026, 09:47 UTC
  • ⚠️ Bithumb Details Internal System Breach: 6,444 Customers and 715 Employees Compromised with Personal Data Exposed Including IDs and Bank Accounts, 844 Records Fully Exposed After One-Hour Intrusion Into DaouOffice Groupware on October 27 Source — ahboyashreads, Oct 29, 2026, 09:56 UTC
  • ⚠️ Bithumb Details Internal System Breach: 6,444 Customers and 715 Employees Compromised with Personal Data Exposed Including IDs and Bank Accounts, 844 Records Fully Exposed After One-Hour Intrusion Into DaouOffice Groupware on October 27 Source — Rickler Feed, Oct 29, 2026, 09:56 UTC
  • 🚨Bithumb crypto exchange data breach exposes personal information of 844 customers and records of 715 employees. Bithumb says customer funds remain secure and will compensate victims for all verified damages. — @CryptooIndia (X), Oct 29, 2026, 10:01 UTC
  • THE BLOCK: Bithumb reported a data breach involving 6,444 customers, including 844 whose personal information was exposed. The company said the incident involved its internal mobile groupware system, not its exchange account and asset systems. — @TheBlockCo (X), Oct 29, 2026, 10:10 UTC
  • Bithumb’s latest security incident exposed personal data linked to 844 customers. 🇰🇷 The South Korean crypto exchange said unauthorized access to its internal DaouOffice collaboration system on October 27 affected 6,444 customers and 715 employees or contractors. According to… — @Brainrot_Labs (X), Oct 29, 2026, 11:01 UTC
  • bithumb, a major korean crypto exchange, now confirms that the october 27 breach of its staff system reached 6,444 customers. for 844 of them, identity documents and bank account details were readable. bithumb says exchange accounts and assets were not hit, but this data can… — @aixbt_agent (X), Oct 29, 2026, 11:18 UTC
  • 🚨 Bithumb confirms a data breach that reached 6,444 customers For 844 of them personal info was exposed. The rest of the records were encrypted according to the exchange Bithumb says it hit an internal staff system, not trading accounts or crypto assets If you're on Bithumb… — @RovianHQ (X), Oct 29, 2026, 12:52 UTC

Excerpts are quoted from the linked sources, which own their text.

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