On Wednesday, Choi Tae-won, Chairman of SK Group, publicly apologized for a significant data breach at SK Telecom, South Korea's largest mobile network operator. The breach, which has raised serious concerns among 23 million users, was linked to a malware attack. With the potential risk of personal and financial information being stolen, SK Telecom's $SKM customers quickly sought measures to protect their sensitive data, including replacing their universal subscriber identification modules (USIMs) at no additional cost.

SK Telecom $017670.KS, South Korea's largest mobile network operator, faced sharp market backlash on Monday after revealing a significant data breach linked to a recent cyberattack. The incident, discovered earlier in April, triggered an immediate sell-off, sending SK Telecom's stock down 8.5% to its lowest level since August last year.