Cookeville Regional Medical Center (CRMC) hit by ransomware attack
Incident
Summary
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The Cookeville Regional Medical Center (CRMC) suffered a ransomware attack that caused a network intrusion and a major data breach affecting more than 337,000 individuals. CRMC discovered the intrusion on July 14, 2025 after files had already been stolen in the prior days. The compromised records could include SSNs, financial account numbers, and medical information, creating ongoing privacy and identity risk.
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How related:
Files were accessed or acquired by an unathorized party between July 11 and July 14, 2025, according to a filing with the Maine Attorney General's Office.
About this happening:
**Cookeville Regional Medical Center** disclosed a **data leak** affecting **337,917 patients**, exposing personal and medical records and raising identity-theft risk. Files were...
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Data LeakHow related: Files were accessed or acquired by an unathorized party between July 11 and July 14, 2025, according to a filing with the Maine Attorney General's Office.
About this happening: **Cookeville Regional Medical Center** disclosed a **data leak** affecting **337,917 patients**, exposing personal and medical records and raising identity-theft risk. Files were...
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Sources 1
How related:
However, they claim they did not find a buyer, and they apparently made the stolen data freely available for download.
About this happening:
The **Rhysida** group’s posting of **Cookeville Regional Medical Center (CRMC)** data exposed sensitive personal, financial, and medical records tied to **more than 337,000 people...
Cookeville Regional Medical Center data leak on Rhysida leak site
Data LeakHow related: However, they claim they did not find a buyer, and they apparently made the stolen data freely available for download.
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About this happening:
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Timeline
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16.04.2026 18:01 1 articles · 1mo ago
Rhysida claims CRMC ransomware intrusion
Attribution UpdateRhysida claimed responsibility for the Cookeville Regional Medical Center ransomware intrusion on August 2, 2025, demanded 10 Bitcoin worth roughly $1.15m, and posted sample files on its dark web leak site.
Show sources
- Cookeville Medical Center Notifies Patients After July 2025 Ransomware Attack — www.infosecurity-magazine.com — 16.04.2026 18:01
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16.04.2026 18:01 2 articles · 1mo ago
CRMC begins breach notifications for 337,917 affected individuals
Initial DisclosureCookeville Regional Medical Center began mailing breach notification letters on April 14, 2026 after a July 2025 ransomware attack that affected 337,917 individuals; a filing with the Maine Attorney General's Office said files were accessed or acquired by an unauthorized party between July 11 and July 14, 2025, and the exposed data may include names, addresses, dates of birth, Social Security numbers, driver's license numbers, financial account details, medical record numbers, treatment information and health insurance data. CRMC also offered 12 months of free identity theft protection through Experian.
Show sources
- Cookeville Medical Center Notifies Patients After July 2025 Ransomware Attack — www.infosecurity-magazine.com — 16.04.2026 18:01
- Cookeville Medical Center Notifies Patients After July 2025 Ransomware Attack — www.infosecurity-magazine.com — 16.04.2026 18:01
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16.04.2026 15:40 1 articles · 1mo ago
CRMC detects network intrusion
Detection Ioc UpdateCookeville Regional Medical Center in Tennessee discovered a network intrusion on July 14, 2025, and investigators determined that certain files had already been stolen in the prior days during a ransomware attack.
Show sources
- Data Breach at Tennessee Hospital Affects 337,000 — www.securityweek.com — 16.04.2026 15:40
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16.04.2026 15:40 1 articles · 1mo ago
CRMC discloses breach scope and affected data
Victim Impact UpdateCookeville Regional Medical Center told the Maine Attorney General’s Office on April 16, 2026 that the breach affects more than 337,000 individuals, that it had no evidence any information was misused, and that the compromised files could include names, dates of birth, addresses, SSNs, driver’s license numbers, financial account numbers, medical treatment information, and health insurance policy information.
Show sources
- Data Breach at Tennessee Hospital Affects 337,000 — www.securityweek.com — 16.04.2026 15:40