Stanislaus County Health Services Agency reported a data security incident involving its third-party vendor, Aesto, LLC. The breach affected AWS infrastructure between December 2 and December 18, 2025. Aesto confirmed that a limited amount of protected health information (PHI) and personal identifiers (names) of patients may have been accessed. The agency notified affected healthcare providers on July 10, 2026. Aesto offered credit monitoring and identity protection services to affected individuals.