Memorial Sloan Kettering Cancer Center
Data Breach on December 13, 2023
| Data Breach Report | ||
|---|---|---|
| Victim | mskcc.org | |
| Threat Actor | Meow | |
| Date Discovered | Dec 13, 2023 | |
| Description | Memorial Sloan Kettering Cancer Center’s specialized care teams provide personalized, compassionate, expert care to patients of all ages. | |
| Leak Size | Unknown |
Credential Exposure for mskcc.org
We've indexed 5,696 @mskcc.org accounts from external breaches, plus 504 credentials for mskcc.org itself.
Last checked Aug 23, 2026
| @mskcc.org addresses from external breaches | |
|---|---|
| Third-party breaches | 5,528 accounts · across 468 breaches · 4,588 with a plaintext password · most recent Mar 8, 2026 |
| Combo lists | 2,156 accounts · most recent Aug 22, 2026 |
| Phishing pages | 30 accounts · most recent Aug 12, 2026 |
| Passwords for mskcc.org accounts | |
|---|---|
| Combo lists | 417 logins · most recent Aug 22, 2026 |
| Infostealer logs | 163 logins · 109 infected devices · most recent Aug 7, 2026 |
Logins may belong to customers or to staff, and the data doesn't say which. None of this is necessarily connected to the ransomware attack above.
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