‘Cybersecurity incident’ hits CT health system. Investigation underway; federal authorities notified

Hartford Courant – Tuesday, March 11, 2025
By Staff Report

What is described as a “cybersecurity incident” hit one of Connecticut’s major health systems over the weekend and the organization has informed federal authorities as well as launching an investigation into it, according to a system spokesperson.

Dana Marnane, director of public relations and communications for Yale New Haven Health, said the system over the weekend “identified an issue affecting IT services across our Health System,” and it did not impact patient care.

“This issue was immediately identified by our Digital and Technology Solutions team, who quickly began working to mitigate the issue and launched an investigation into its source,” Marnane said. “Working with Mandiant, an internationally renowned cybersecurity firm, our investigation determined that the issue was a cybersecurity incident.”

Marnane said the health system is “notifying federal authorities of the incident and Mandiant is conducting a thorough investigation.”

“Due to our team’s quick action to identify and help to contain this incident, it has not affected our ability to provide patient care,” Marnane said.

“Our patient portal and electronic medical records are running as normal, and our teams are working hard to manage the impact of phone and internet connection issues on patient care. There remain intermittent internet and application connectivity issues as our team rebuilds access to programs – this is purposeful and part of our comprehensive protocols for mitigating cybersecurity events.”

Marnane said Yale New Haven Health apologizes for “any inconvenience or delays these issues may cause, and we thank our staff, patients and community members for their patience as we work to restore full access across our systems. We will continue to keep our staff and patients apprised of updates, as appropriate.”

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