Colorado Health Network Confirms Data Breach Exposing Sensitive Patient Information
Colorado Health Network (CHN), a provider of holistic support services for individuals with HIV, has confirmed a data breach involving unauthorized access to its systems. The incident, disclosed following an investigation, revealed that an unauthorized actor accessed and exfiltrated files containing highly sensitive information.
Affected data may include names, Social Security numbers, driver’s license or state ID numbers, passport details, financial account information, credit or debit card numbers, medical records, and health insurance data. The breach was first flagged on August 28, 2025, when the ransomware group Cephalus claimed responsibility, alleging the theft of over 900 GB of data from CHN.
Notifications to impacted individuals began on June 18, 2026. Legal representatives are now investigating the possibility of a class action lawsuit on behalf of those affected, seeking compensation for privacy violations, financial losses, and other damages. The breach underscores ongoing vulnerabilities in healthcare data security, particularly for organizations handling sensitive patient information.
Source: https://www.classaction.org/data-breach-lawsuits/colorado-health-network-june-2026
Colorado Health Network cybersecurity rating report: https://www.rankiteo.com/company/coloradohealthnetwork
"id": "COL1781929577",
"linkid": "coloradohealthnetwork",
"type": "Ransomware",
"date": "6/2026",
"severity": "100",
"impact": "4",
"explanation": "Attack with significant impact with customers data leaks"{'affected_entities': [{'industry': 'Healthcare',
'location': 'Colorado, USA',
'name': 'Colorado Health Network (CHN)',
'type': 'Healthcare Provider'}],
'attack_vector': 'Ransomware',
'customer_advisories': 'Notifications to impacted individuals began on June '
'18, 2026',
'data_breach': {'data_exfiltration': '900 GB of data allegedly stolen',
'personally_identifiable_information': 'Yes',
'sensitivity_of_data': 'High',
'type_of_data_compromised': ['Names',
'Social Security numbers',
'Driver’s license or state ID '
'numbers',
'Passport details',
'Financial account information',
'Credit or debit card numbers',
'Medical records',
'Health insurance data']},
'date_detected': '2025-08-28',
'date_publicly_disclosed': '2026-06-18',
'description': 'Colorado Health Network (CHN), a provider of holistic support '
'services for individuals with HIV, confirmed a data breach '
'involving unauthorized access to its systems. The incident '
'revealed that an unauthorized actor accessed and exfiltrated '
'files containing highly sensitive information, including '
'names, Social Security numbers, driver’s license or state ID '
'numbers, passport details, financial account information, '
'credit or debit card numbers, medical records, and health '
'insurance data. The breach was first flagged on August 28, '
'2025, when the ransomware group *Cephalus* claimed '
'responsibility, alleging the theft of over 900 GB of data '
'from CHN. Notifications to impacted individuals began on June '
'18, 2026.',
'impact': {'brand_reputation_impact': 'Likely significant',
'data_compromised': 'Highly sensitive patient information',
'identity_theft_risk': 'High',
'legal_liabilities': 'Potential class action lawsuit',
'payment_information_risk': 'High'},
'investigation_status': 'Ongoing (legal investigation)',
'motivation': 'Financial gain, data exfiltration',
'ransomware': {'data_exfiltration': 'Yes', 'ransomware_strain': 'Cephalus'},
'references': [{'source': 'Cyber Incident Description'}],
'regulatory_compliance': {'legal_actions': 'Potential class action lawsuit',
'regulations_violated': ['HIPAA (likely)']},
'response': {'communication_strategy': 'Notifications to impacted individuals '
'began on June 18, 2026'},
'threat_actor': 'Cephalus',
'title': 'Colorado Health Network Data Breach Exposing Sensitive Patient '
'Information',
'type': 'Data Breach'}