Quest Diagnostics Discloses Unauthorized Access To Its Testing Management Platform Quanum LSM System; Company Promptly Initiated Its Cybersecurity Incident Response Procedures To Contain The Activity; Sees No Material Disruption
On October 21, 2026, Quest Diagnostics Incorporated (the "Company") learned of unauthorized access to its Quanum LSM system, which certain clients use to place test orders, receive and look up results. The
Quest Diagnostics found that someone got into their ordering system without permission. The company is fixing it and says their testing work is still running fine.
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