Bithumb Confirms Security Breach as South Korea Probes Financial Hacks

South Korean crypto exchange Bithumb has confirmed a security breach involving its internal communication system. The platform is currently investigating a possible data leak and has guaranteed that customer data remains safe. The latest incident adds to the growing number of cyberattacks affecting South Korea’s financial sector.

Bithumb confirms security breach

Bithumb has disclosed a security breach in its internal mobile system on October 27, 2026. The system, as announced by the platform, is used by employees to communicate and share information internally. On the same day of discovering the issue, Bithumb reported it to South Korea’s cybersecurity and data protection authorities.

Now, the platform is investigating the extent of the breach. The team is also looking into the incident to see if any customer information was exposed. As the exchange’s internal system is separate from its crypto trading platform, the breach does not allow attackers to access customers’ crypto assets. As the probe continues, Bithumb has yet to disclose more details about the security breach.

Other South Korean financial firms report data breaches

It is worth noting that Bithumb is not the only South Korean financial company facing a security issue. Other major firms like Mirae Asset Global Investments and Daishin Securities have also reported similar issues. These repeated cyberattacks prompt financial authorities to inspect the affected companies.

Daishin Securities confirmed that personal and financial information of about 38,490 customers had been exposed. The leaked information includes names, email addresses, home addresses, bank account details, and mobile numbers. The platform identified signs of unauthorized access on October 17. The team also worked with the Financial Security Institute to probe the incident.

Similarly, Mirae Asset Global Investments reported illegal access to some of its online systems. However, as per the company’s revelation, no evidence of a customer data leak was found.

South Korea steps up cybersecurity checks after multiple breaches

After reporting multiple security breaches in South Korea, the financial authority is now focusing on cybersecurity. Financial Supervisory Service Governor Lee Chan-jin has urged financial institutions to improve their IT security systems.

The Governor met board chairs of eight bank holding companies on Wednesday. During this meeting, he warned about the growing threat of AI-based hacking attacks. As hackers use AI-related systems to execute their attacks, it is becoming difficult for companies to detect suspicious activity and protect sensitive customer information.

These incidents have also raised concerns about how well financial companies protect consumer data. While the Daishin Securities incident exposed data of nearly 40,000 customers, Bithumb and Mirae have yet to identify whether the security breaches have resulted in customer data leaks.

Financial authorities are now examining the incidents while the companies work to understand the implications of the breaches. Their findings could help identify security gaps and encourage financial platforms to strengthen their systems.