Bithumb cryptocurrency exchange suffers data breach

Bithumb data breach cryptocurrency exchange South Korea cyberattack

South Korean cryptocurrency exchange Bithumb confirmed a security breach involving its internal mobile groupware system, Daou Office. The unauthorized access, which occurred on October 27, lasted approximately one hour.

According to company disclosures, the breach affected 6,444 customer records and 715 employees or external contractors. While 5,600 customer records remained encrypted and unreadable, personal information for 844 customers was confirmed to have been leaked. Exposed data may include names, mobile numbers, email addresses, resident registration numbers, bank account details, and copies of identification documents.

Bithumb emphasized that the compromised groupware system is physically and operationally separate from its core cryptocurrency trading platform and customer asset management systems. The company stated that no customer funds or wallet addresses were accessed or stolen during the incident.

South Korean regulators, including the Financial Services Commission (FSC) and the Personal Information Protection Commission, have launched on-site inspections to investigate the cause and assess the extent of the exposure. Bithumb has pledged to compensate affected customers and is working with security agencies to strengthen its internal controls.

Entities

Bithumb · Changpeng Zhao · Coinbase · Daou Office · Financial Services Commission · Korea Internet & Security Agency · South Korea

Claims

What the coverage asserts, and how many sources carry each claim.

[● 3 SOURCES] Personal information for 844 customers was confirmed to have been leaked. bitcoinbasis.de · mycryptoparadise.com · www.neweconomy.jp
[● 2 SOURCES] Bithumb reported the breach to the Korea Internet & Security Agency and the Personal Information Protection Commission. www.tronweekly.com · blockchainreporter.net
[● 3 SOURCES] The breach affected 6,444 customer records and 715 employees or external staff. bitcoinbasis.de · mycryptoparadise.com · www.neweconomy.jp
[● 3 SOURCES] South Korean regulators have launched on-site inspections at Bithumb. cryptocompass.com · cryptoslate.com · www.nadanews.com
[● 3 SOURCES] 5,600 customer records were protected by encryption and remained unreadable. bitcoinbasis.de · mycryptoparadise.com · www.neweconomy.jp
[● 4 SOURCES] The compromised system is separate from the core cryptocurrency trading network. www.tronweekly.com · blockchainreporter.net · mycryptoparadise.com · www.neweconomy.jp
[● 7 SOURCES] Bithumb's internal mobile groupware system, Daou Office, was breached by an external party. cryptocompass.com · www.tronweekly.com · bitcoinbasis.de · blockchainreporter.net · mycryptoparadise.com · +2 more
[● 5 SOURCES] No customer cryptocurrency assets or wallet addresses were stolen. www.tronweekly.com · blockchainreporter.net · mycryptoparadise.com · www.sofx.com · www.neweconomy.jp