← University of Hawaii Cancer Center

2026 University of Hawaii Cancer Center — 1.2M records (ransomware)

2026 1.2M records affected Share on X

Data compromised

Social Security numbers, driver licenses, names, health-related research data, registry information

Technical writeup

University of Hawaii Cancer Center suffered ransomware attack affecting ~1.2 million individuals. Epidemiology Division research data compromised including Multiethnic Cohort Study files from late 1990s–2000s. SSNs, driver licenses, names, health research data exposed. Largest affected groups: State DOT records (2000), Honolulu voter registration (1998). Dedicated call center established for credit monitoring enrollment.

Root cause

Ransomware attack

References