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Ransomware Attack on Ontario Health Agency Vendor Exposed in 2025
First seen 9 Mar 2026, 14:54 UTC
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In March 2025, Ontario Medical Supply (OMS), a vendor for Ontario Health atHome, suffered a significant ransomware attack that remained undisclosed for months. The incident raised scrutiny over the agency's cybersecurity practices and the handling of sensitive patient information.
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Timeline
2025-03-01
Ontario Medical Supply (OMS) first infiltrated by ransomware
2025-06-01
Incident kept under wraps for months
2026-03-09
Global News reports on the ransomware attack