HMH
Data Breach on October 06, 2025
| Data Breach Report | |||
|---|---|---|---|
| Victim | hmhco.com | ||
| Claimed By | ScatteredLAPSUSHunters | ||
| Date Discovered | Oct 06, 2025 | ||
| Description | HMH is an educational publisher and edtech company based in the USA (Massachusetts), offering K-12 curriculum, instructional content, assessment tools, professional learning, and digital learning solutions. | ||
| Leak Size | 88GB |
Credential Exposure for hmhco.com
We've indexed 957 @hmhco.com accounts from external breaches, plus 12,844 credentials for hmhco.com itself.
Last checked Oct 4, 2026
| @hmhco.com addresses from external breaches | |
|---|---|
| Third-party breaches | 871 accounts · across 161 breaches · 806 with a plaintext password · most recent Jan 25, 2026 |
| Combo lists | 186 accounts · most recent Sep 30, 2026 |
| Passwords for hmhco.com accounts | |
|---|---|
| Combo lists | 11,030 logins · most recent Oct 4, 2026 |
| Infostealer logs | 4,270 logins · 2,536 infected devices · most recent Oct 3, 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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