# University of New Mexico Health System cyberattack > Developing situation record from CLSTR: https://clstr.news/situations/university-of-new-mexico-health-system-cyberattack > Updated: 2026-10-29T13:48:21.000Z. Sources: 7. Developments: 2. A cybersecurity breach at the University of New Mexico (UNM) Health System caused significant disruptions to medical services, including the diversion of ambulance traffic from the state’s only Level I Trauma Center and the cancellation of appointments across more than 30 facilities. During the initial phase of the incident, employees were instructed to disconnect devices from the network following reports of a ‘network security breach’ and potential data theft. By the following week, UNM confirmed that hospital systems, the medical school, and research facilities had been fully restored. Officials stated that while end-user devices were affected, the attack did not penetrate core systems or servers, and the university did not pay a ransom. A ransomware group identified as BYOD claimed responsibility, alleging the compromise of 36,000 machines and two Oracle databases. Although the group offered decryption keys for free, they threatened to retain stolen patient and employee data unless individuals paid $2,500. UNM has advised all affected parties to avoid contact with the hackers and to report any communications to the FBI. ## Timeline ### 2026-10-29: University of New Mexico restores hospital systems after cyberattack The University of New Mexico has restored its healthcare and academic systems following a cyberattack that disrupted ambulance services and surgeries. A ransomware group claimed responsibility. 3 sources. https://clstr.news/cluster/university-of-new-mexico-restores-hospital-systems-after-cyberattack ### 2026-10-27: University of New Mexico Health System hit by cybersecurity breach A cybersecurity breach at the University of New Mexico Health System has forced the closure of clinics and the diversion of ambulances from the state's only Level I Trauma Center. 5 sources. https://clstr.news/cluster/university-of-new-mexico-health-system-hit-by-cybersecurity-breach --- Cite as: University of New Mexico Health System cyberattack. CLSTR, https://clstr.news/situations/university-of-new-mexico-health-system-cyberattack