A major data breach affecting 25 million SK Telecom subscribers has sparked security concerns for the company. The attack involved the infiltration of the Home Subscriber Server via advanced malware. This breach exposed sensitive subscriber information, leading to a significant financial impact on the company and sparking investor anxieties. SK Telecom’s CEO addressed the incident publicly, stating their commitment to replacing SIM cards. Security agencies are currently investigating the attack. As a result of this breach, SK Telecom’s share prices have declined significantly, reflecting ongoing investor concerns. The company is taking steps to mitigate the impact by offering free SIM card replacements and temporarily halting new sign-ups to address disruptions caused by the incident. Though unprecedented for SK Telecom, past similar breaches have highlighted the increasing sophistication of cyberattacks targeting telecommunications companies. This incident is likely to prompt a review of security measures within the telecom industry, possibly leading to stricter data protection regulations in the future.