Optimum Window
Data Breach on December 21, 2025
| Data Breach Report | |||
|---|---|---|---|
| Victim | optimumwindow.com | ||
| Threat Actor | Sinobi | ||
| Date Discovered | Dec 21, 2025 | ||
| Description | Optimum Window Inc. is a building products company based in the USA (New York), specializing in replacement windows, doors, and exterior building components for residential and commercial construction. | ||
| Leak Size | Unknown |
Credential Exposure for optimumwindow.com
We've indexed 17 @optimumwindow.com accounts from external breaches, plus 4 credentials for optimumwindow.com itself.
Last checked Aug 16, 2026
| @optimumwindow.com addresses from external breaches | |
|---|---|
| Third-party breaches | 16 accounts · across 22 breaches · 16 with a plaintext password · most recent Sep 18, 2024 |
| Combo lists | 7 accounts · most recent Jul 27, 2026 |
| Passwords for optimumwindow.com accounts | |
|---|---|
| Combo lists | 3 logins · most recent May 21, 2026 |
| Infostealer logs | 1 logins · 2 infected devices · most recent Jul 6, 2023 |
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.
Is your organization next?
Optimum Window was breached. Check if your company's credentials have been exposed in this or other data breaches.
Check your exposure →Continuous dark web monitoring alerts you when we find leaked credentials or session tokens for your company.