SK Telecom
Disclosed Apr 22, 20251 year agoUnverified
SIM data of about 23 million SK Telecom customers stolen in hack
South Korea's largest carrier SK Telecom was hacked in April 2025 and USIM-related data on about 23 million customers was taken, prompting a mass SIM replacement program and customer departures; SKT was later fined about $91 million.
What is known
| People affected | Not stated in the sources we have |
|---|---|
| Disclosed | Apr 22, 2025 |
| Attack | Hacking |
| Data exposed | Phone numbers, Other |
| Sector | Telecom · KR |
| Status | Unverified: not yet confirmed by an official notice, a filing or the organization |
| Lawsuit or fine | Fined about $91 million by South Korean regulators (about $91M) |
Sources
| Source | |
|---|---|
| A timeline of South Korean telco giant SKT's data breachtechcrunch.com · News | News |
| Hacks, thefts, and disruption: The worst data breaches of 2025techcrunch.com · News | News |
Notices filed
| Where | Filed | People |
|---|---|---|
| Researchtotal | Apr 22, 2025 |
History of this record
- 2026-09-25 · added · seed source
First seen 2026-09-25 (Research). Record counts are as reported. Not legal advice.