Multistack
Data Breach on June 19, 2023
| Data Breach Report | ||
|---|---|---|
| Victim | multistack.com | |
| Threat Actor | Blackbyte | |
| Date Discovered | Jun 19, 2023 | |
| Description | Multistack manufactures modular and conventional chillers, modular geothermal heat pumps, modular air-to-water heat pumps, and modular Dedicated Heat Recovery Chillers (DHRC®) in Sparta, Wisconsin. | |
| Leak Size | Unknown |
Credential Exposure for multistack.com
We've indexed 41 @multistack.com accounts from external breaches, plus 6 credentials for multistack.com itself.
Last checked Aug 16, 2026
| @multistack.com addresses from external breaches | |
|---|---|
| Third-party breaches | 40 accounts · across 31 breaches · 37 with a plaintext password · most recent Dec 18, 2025 |
| Combo lists | 14 accounts · most recent Aug 6, 2026 |
| Passwords for multistack.com accounts | |
|---|---|
| Combo lists | 6 logins · 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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