Data Breaches Centers Laboratory Data Breach Affects 540,000 Individuals The WorldLeaks extortion group claimed to have stolen 720 GB of data from the healthcare testing and laboratory services provider. By Eduard Kovacs | July 13, 2026 (4:10 AM ET) Flipboard Reddit Whatsapp Whatsapp Email Healthcare diagnostics company Centers Laboratory (Centers Lab NJ LLC) has informed the US government that a data breach discovered nearly one year ago affects more than 540,000 individuals. According to a data breach notice posted on its website, the New Jersey-based provider of testing and laboratory services for healthcare organizations discovered an intrusion in its IT environment in August 2025. An investigation showed that threat actors had gained “limited access” to Centers Laboratory systems between August 9 and August 14, exfiltrating personal and protected health information, including names, dates of birth, SSNs, driver’s license or state identification numbers, passport numbers, and health insurance and medical information. The healthcare data breach tracker maintained by the Department of Health and Human Services revealed last week that the data breach affects 542,377 individuals. Centers Lab was targeted by the WorldLeaks cybercrime group, which listed the organization on its website in October 2025. The hackers leaked more than 1.6 million files totaling 720 GB, allegedly stolen from Centers Lab systems. Advertisement. Scroll to continue reading. WorldLeaks, which made headlines for targeting major companies such as Nike and Dell , emerged in 2025 following the shutdown of the Hunters International ransomware group. Following the transition to WorldLeaks, the cybercriminals stopped using file-encrypting malware and have focused on data theft and extortion. More than 170 organizations are listed on the group’s website at the time of writing. Related : 12 Million Impacted by Data Breach at Japanese Telco KDDI Related : Mount Royal University Confirms Data Stolen in Ransomware Attack Related : Accenture Confirms Data Breach After Hacker Claims Source Code Theft Related : Medtronic Data Breach Impacts 3.8 Million People Written By Eduard Kovacs Eduard Kovacs (@EduardKovacs) is senior managing editor at SecurityWeek. He worked as a high school IT teacher before starting a career in journalism in 2011. Eduard holds a bachelor’s degree in industrial informatics and a master’s degree in computer techniques applied in electrical engineering. Daily Briefing Newsletter Subscribe to the SecurityWeek Email Briefing for the latest cybersecurity threats, trends, and expert insights. 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Webinar: Why Email Security Keeps Failing (And What Has to Change) July 8, 2026 Join this live webinar as we break down why email-layer defenses alone can't keep pace with the modern phishing ecosystem, how agentic AI is changing the capacity equation for security teams, and more. Register Virtual Event: 2026 Cloud Security Summit July 16, 2026 This year's summit will help organizations learn how to utilize tools, controls, and design models needed to properly secure cloud environments. Interact with leading solution providers and other end users facing similar challenges in securing a variety of cloud deployments. Register People on the Move BlueVoyant has appointed Ravi Subramanian as CFO and Jamie Coleman as CCO. Solana Foundation has appointed Michael Coates as Chief Information Security Officer. Michael Sikorski has joined Coinbase as Chief Information Security Officer. 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