SK Telecom Data Breach: Timeline, Impact & What You Need to Know
Discover the timeline of SK Telecom's massive data breach affecting 23 million customers.
Matilda
SK Telecom Data Breach: Timeline, Impact & What You Need to Know
In April 2025, SK Telecom (SKT), South Korea’s leading telecommunications company, suffered a major data breach that compromised the personal information of over 23 million customers. This cyberattack has become one of the most severe security incidents in the company’s history, with implications affecting nearly half of South Korea's population. If you're looking for details on how this breach occurred, its timeline, and the ongoing efforts to mitigate its effects, you're in the right place. Image Credits:Li Xin / Getty Images SKT's breach has raised significant concerns among its customers, with sensitive data, including phone numbers, USIM authentication keys, and unique identifiers, stolen from their central subscriber database. This breach exposes customers to risks like SIM swapping and even government surveillance. To make matters worse, the breach could cost the telecom giant up to $5 billion over the next three years, depending on how they handl…
