Tieu Dental Corporation reported unauthorized access to its network between July 28-29, 2025. On January 11, 2026, the company determined that personal information, including full names and Social Security numbers, may have been accessed and acquired. The incident involved potential exfiltration of PHI and PII. The company contained the threat, engaged third-party cybersecurity professionals, and is offering one year of complimentary identity monitoring to affected individuals.