Madera County Superintendent of Schools
Data Breach on December 26, 2025
| Data Breach Report | |||
|---|---|---|---|
| Victim | mcsos.org | ||
| Threat Actor | Qilin | ||
| Date Discovered | Dec 26, 2025 | ||
| Description | Madera County Superintendent of Schools is a public education administrative organization based in the USA (California), providing support, programs, services, and resources to school districts, families, and students throughout Madera County. | ||
| Leak Size | 310GB |
Credential Exposure for mcsos.org
We've indexed 18 @mcsos.org accounts from external breaches.
Last checked Aug 16, 2026
| @mcsos.org addresses from external breaches | |
|---|---|
| Third-party breaches | 16 accounts · across 5 breaches · 16 with a plaintext password · most recent Feb 24, 2025 |
| Combo lists | 2 accounts · most recent Mar 25, 2026 |
None of this is necessarily connected to the ransomware attack above.
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