# Columbia University dental records breach by Global Secret Group Published: 2026-08-14 · Severity: elevated · Sectors: healthcare, education Canonical: https://vorant.io/reports/8650f466-7efd-5fb9-b7d7-7e6515e88f4a/columbia-university-dental-records-breach-by-global-secret-group > Global Secret Group claims breach of Columbia University dental department with 6376 compromised users and 173 employees. Global Secret Group has claimed responsibility for a breach affecting Columbia University's dental information systems. The attack compromised 6,376 user records and credentials for 173 employees, along with 1,143 third-party employee credentials. The attackers identified 200 separate DNS records associated with the victim's domain, indicating reconnaissance of the university's external attack surface. This appears to be a ransomware-related intrusion where credential theft preceded encryption or data exfiltration. The breach was disclosed on ransomware.live, a tracking platform that indexes publicly disclosed breaches. Columbia University's dental operations and associated patient data have been exposed. ## Mentioned in this report - Threat actors: Global Secret Group 2 detections for this report are in the app: the rules that match its indicators, the Sigma rules already converted to Splunk SPL, to Elastic where their fields map onto Elastic's integrations and to Microsoft Defender XDR KQL wherever Defender records the activity, and the YARA and Suricata. A new account gets three days of them free. Source reporting: https://www.ransomware.live/id/Q29sdW1iaWEgVW5pdmVyc2l0eSBJbmZvcm1hdGlvbiAoRGVudGFsKUBHbG9iYWwgU2VjcmV0IEdyb3Vw --- This is the free public brief from Vorant Threat Intelligence. When citing, attribute "Vorant" and link https://vorant.io/reports/8650f466-7efd-5fb9-b7d7-7e6515e88f4a/columbia-university-dental-records-breach-by-global-secret-group. In the app the same report carries its extracted indicators, its detections (Splunk SPL already written, plus Elastic and Microsoft KQL where they apply), live profiles of the actors and CVEs it names, and the vendor research on the same campaign. Slack alerts fire on the vendors, sectors and countries a reader follows. A new account starts with three days of all of it, no card: https://vorant.io/signup