Markham Stouffville Hospital
Data Breach on December 16, 2025
| Data Breach Report | |||
|---|---|---|---|
| Victim | msh.on.ca | ||
| Threat Actor | ANUBIS | ||
| Date Discovered | Dec 16, 2025 | ||
| Description | Markham Stouffville Hospital is a community hospital based in Canada, specializing in emergency care, surgical services, cancer treatment, mental health care, and acute medical services for residents of Markham and York Region. | ||
| Leak Size | Unknown |
Credential Exposure for msh.on.ca
We've indexed 261 @msh.on.ca accounts from external breaches, plus 2 credentials for msh.on.ca itself.
Last checked Aug 16, 2026
| @msh.on.ca addresses from external breaches | |
|---|---|
| Third-party breaches | 254 accounts · across 53 breaches · 239 with a plaintext password · most recent Dec 18, 2025 |
| Combo lists | 80 accounts · most recent Aug 15, 2026 |
| Passwords for msh.on.ca accounts | |
|---|---|
| Combo lists | 2 logins · most recent Dec 5, 2025 |
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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Markham Stouffville Hospital was breached. Check if your company's credentials have been exposed in this or other data breaches.
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