Bithumb hacked through employee system as South Korean financial firms face cyberattacks
South Korean cryptocurrency exchange Bithumb has suffered a security breach after hackers gained access to its systems through a compromised employee account, according to a report published by CoinDesk on October 28, 2026. The attack is part of a broader wave of cyberattacks targeting financial institutions across South Korea, though specific figures regarding stolen funds or affected user accounts had not been fully disclosed at the time of reporting.
The incident adds to Bithumb's history of security vulnerabilities. The exchange, one of South Korea's largest crypto trading platforms by volume, previously experienced significant hacks in 2018 and 2019, resulting in combined losses of tens of millions of dollars. The latest breach, carried out via an internal employee system, highlights persistent risks associated with insider access points and social engineering tactics frequently employed by sophisticated threat actors.
The attack comes amid growing concern over the security posture of South Korean financial firms more broadly, with multiple institutions reportedly facing coordinated cyberoffensives. For the crypto industry, the incident underscores the continued importance of robust internal access controls, multi-factor authentication, and employee security training as critical lines of defense against intrusions.
Regulators and industry observers will likely be watching closely for further disclosures from Bithumb regarding the full scope of the breach, potential user impact, and any regulatory response from South Korean financial authorities, including the Financial Services Commission.
Source: CoinDesk
