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Incident

UConn Health

Incident posture

Attack window
Dec 2018
Location
United States of America
Status
Historical
CIA posture
Available to members
Updated
2025-11-26 00:00

Linked entities

Victim
UConn Health
Threat actors
0 actors
Sources
1 source

Timeline

Occurred
Dec 2018
Discovered
Pending
Disclosed
Pending
Resolved
Pending

Summary

An unauthorized party accessed employee email accounts at UConn Health, potentially compromising personal and medical data of approximately 326,000 patients. Exposed information included names, dates of birth, addresses, limited medical details such as billing and appointment records, and Social Security Numbers for about 1,500 individuals. The organization found no evidence of fraud or identity theft stemming from the incident and confirmed its computer networks and electronic medical records remained unaffected. Notification letters were sent to potentially impacted individuals, law enforcement was engaged, and a forensic security firm assisted the investigation.

Motives

Detailed motive labels are available to members.

2 motives

TTPs

Detailed technique labels are available to members.

1 technique

Description

On December 24, 2018, an unauthorized party gained access to multiple employee email accounts at UConn Health, a Connecticut-based academic medical center. The breach was discovered during a subsequent investigation, though the exact method of initial compromise was not publicly detailed. The incident exposed sensitive patient information stored within these email accounts, potentially affecting approximately 326,000 individuals. Compromised data included names, dates of birth, physical addresses, and limited medical information related to billing details and appointment records. A subset of approximately 1,500 individuals had their Social Security Numbers exposed through the breached accounts. UConn Health explicitly stated the incident did not involve unauthorized access to its core computer networks or electronic medical record systems, limiting the intrusion to specific email accounts.

UConn Health initiated a multi-phase response beginning with forensic analysis conducted by a specialized security firm to determine the breach's scope. Notification letters were mailed to all potentially affected individuals, advising them of the exposed data categories while acknowledging uncertainty regarding whether information was actually viewed or acquired by the attacker. The organization coordinated with law enforcement agencies but did not disclose specific investigative partners. Public statements emphasized no evidence of fraud or identity theft linked to the breach at the time of disclosure. Remediation efforts focused on securing the compromised email accounts, though technical controls implemented were not described in available reports. The breach disclosure occurred nearly two months post-incident on February 22, 2019, through UConn Health's official channels and subsequent media coverage.

Sources

Sources available to members: 1 source.

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