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Published signals
currently linked to this company
Company intelligence
Ummc cybersecurity incidents and threat signals
ummc.edu
This company page brings together public reporting currently associated with Ummc. It reflects signals published by Shadow Tier and should not be read as a complete incident history.
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Last 28 days
recent published signals
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Last 90 days
recent published signals
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High or critical
confidence classifications
June 26, 2026
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most recent published signal
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Based on all published signals currently linked to Ummc. Affected countries come from victim data; the company country above remains a separate profile fact. Counts describe this reporting set, not overall incident prevalence.
Attack patterns
Confirmed impacts
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All published signals involving Ummc
University of Mississippi Medical Center hit by Medusa ransomware, 1TB of patient data stolen
The Medusa ransomware gang claimed responsibility for an attack on the University of Mississippi Medical Center (UMMC), posting the organization to its dark web leak site on March 12, 2026. The attack, which began on February 19, forced the closure of 35 clinics, suspended elective surgeries, and disrupted access to the Epic EHR system. Medusa claimed to have stolen over 1TB of patient health information and employee records and demanded an $800,000 ransom.
FAQ
Questions about Ummc cybersecurity reporting
What does the Ummc page include?
It combines a reviewed organization profile with all current published Shadow Tier signals explicitly linked to Ummc.
Does every mention of Ummc appear here?
No. A signal must contain a reliable company connection and meet the publication criteria; incidental or ambiguous mentions are excluded.
Why can the incident count change?
The page follows current published reporting. Counts change as new evidence is added, classifications are reviewed, or older signals leave the reporting window.