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RansomwareSep 9, 2026

Veradigm warns of patient data breach after ransomware gang claims attack

Veradigm reports patient data breach after ransomware gang claims attack.

Healthcare technology company Veradigm has disclosed a data breach impacting patient personal data, including Social Security numbers, following a cybersecurity incident at a third-party vendor. The Gentlemen ransomware group has claimed responsibility, alleging to possess 3.5 million patient records and threatening to leak the data if a ransom is not paid. Veradigm is investigating and notifying affected parties, stating that clinical information remains secure.

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The lesson from this incident

Full lesson

The Veradigm breach highlights a critical and growing risk: sensitive patient data being exposed not through a direct attack on the primary organization, but through a compromise at a third-party vendor. Healthcare organizations routinely share protected health information (PHI) and personally identifiable information (PII) — including Social Security numbers — with vendors, yet oversight of those vendors' security postures is often insufficient. The Gentlemen ransomware group's claim to hold 3.5 million records demonstrates the scale of damage that a single weak link in the supply chain can cause. This incident underscores that a healthcare entity's regulatory and ethical obligations to protect patient data do not end at its own perimeter — they extend to every vendor entrusted with that data.

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Indicators of Compromise

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  • malware — GentleKiller
  • malware — SystemBC

Entities

Veradigm (vendor)The Gentlemen (threat_actor)API (product)ransomware (technology)