Bithumb Reports Internal System Hack as South Korean Financial Data Breaches Spread

South Korean cryptocurrency exchange Bithumb disclosed a personal data breach on October 28, following unauthorized access to its internal mobile system. The exchange discovered the incident on October 27 and is investigating whether customer information was compromised. The affected platform supports employee communications and internal business operations. Bithumb has not confirmed the number of affected individuals or the full extent of the exposed information.

The exchange reported the incident to the Korea Internet & Security Agency and the Personal Information Protection Commission. Investigators are examining the intrusion and identifying the information accessed. The breach comes amid a broader wave of cyberattacks targeting South Korea’s financial sector. Brokerage Daishin Securities separately disclosed that hackers exposed personal information belonging to 38,490 customers. Asset manager Mirae Asset Global Investments also reported unauthorized system access.

According to Reuters, 16 South Korean financial institutions had experienced cyberattacks earlier this month, involving approximately 100,000 data leaks. Financial authorities are assessing the latest incidents as concerns grow over cybersecurity vulnerabilities. Meanwhile, Bithumb continues investigating whether the intrusion extended beyond employee-related systems to customer records. The exchange has not disclosed any confirmed cryptocurrency losses linked to this incident.