Centers Laboratory Data Breach Exposes 540,000 Patient Records

Centers Laboratory, a healthcare diagnostics provider in New Jersey, suffered a data breach affecting approximately 540,000 individuals between August 9 and August 14, 2025. The breach was discovered on August 25, 2025, and publicly disclosed on June 18, 2026. The unauthorized actor, known as Worldleaks, accessed and exfiltrated sensitive personal and health information, including Social Security numbers and medical records. The attack vector remains undisclosed, but it is suspected to involve compromised credentials or insider access. The exfiltrated data was leaked on the Tor dark web, increasing the risk of further exploitation. Centers Laboratory has advised affected individuals to monitor their accounts and has set up a support line. Regulatory investigations are ongoing, and the breach has triggered mandatory reporting under HIPAA and state laws. No technical indicators of compromise have been published as of June 2026.

Key Points: • 540,000 patient records exposed in a data breach by Centers Laboratory. • The breach occurred from August 9 to August 14, 2025, and was disclosed in June 2026. • Worldleaks claimed responsibility and leaked data on the Tor dark web.