Thomson Reuters disclosed that an unauthorized party gained access to files from C-Track, a court case management platform operated by its West Publishing Corporation subsidiary. The breach occurred in March 2026 and was discovered on June 30, 2026. The incident affected courts across 11 U.S. states, the U.S. Virgin Islands, and Ontario, Canada. Exposed data may include sensitive personal information such as Social Security Numbers (SSNs) and sealed court records. The breach raises serious concerns about the exposure of confidential legal data and the privacy of individuals involved in court proceedings. West Publishing is notifying affected courts and individuals. The scale of the breach and the sensitivity of the data involved make this a high-impact incident for both the legal system and affected individuals.