Breachesby GlyphSK Telecom
Disclosed Apr 22, 2025Unverified
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 numbersOther |
| 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
Notices filed
History of this record
First recordedby seedSource
First seen 2026-09-25 (Research). Record counts are as reported. Not legal advice.