WuBlockchain
An approximately one-hour intrusion into Bithumb’s internal DaouOffice groupware on October 27 resulted in personal data being taken from 6,444 customers, the South Korean exchange disclosed. The records included names, mobile numbers, resident registration numbers, bank account numbers and copies of identification documents. Data from 844 customers was directly exposed; 5,600 other records remained encrypted and unreadable. Information involving 715 employees and external personnel was also compromised.
Why it matters
The incident involves highly sensitive identity and financial details, creating risks beyond a trading-account breach. Bithumb said it notified authorities and pledged full compensation for verified damages.
Market impact
Bithumb said the groupware system is isolated from its core trading operations and asset databases, and that customer funds remain secure. The breach therefore concerns personal-data exposure, not reported access to trading systems or customer assets.
Frequently asked questions
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How many Bithumb customers had personal data exposed?
Data from 6,444 customers was taken. Bithumb said information from 844 was directly exposed, while 5,600 records remained encrypted and unreadable.
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What information was involved in the Bithumb breach?
The compromised customer records included names, mobile numbers, resident registration numbers, bank account numbers and copies of identification documents.
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Were Bithumb customer funds or trading systems affected?
Bithumb said the breached groupware is isolated from its core trading operations and asset databases, and that customer funds remain secure.
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Who else had information compromised in the incident?
Records involving 715 employees and external personnel were also compromised.
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What response has Bithumb announced?
Bithumb said it formally notified authorities and pledged full compensation for any damages verified as resulting from the incident.
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