Colorado Health Network Notifies Patients of Last Year’s Breach—But Key Details Remain Undisclosed

In August 2025 the actor "Cephalus" claimed to have taken 900 GB of data from Colorado Health Network (CHN); CHN later confirmed unauthorized access and that files containing names, SSNs, identity documents, financial account and card data, and medical/insurance information were viewed and obtained. CHN began notifying affected individuals on June 18, 2026, but the notice omits when the breach occurred, how many were affected, whether a ransom was demanded, and there is no public record of the claimed leak or HHS notification.