Quest Diagnostics breach: patient records accessed via Quanum Lab Services Manager

Teaser from the source

Quest Diagnostics says it learned on Oct 21 2026 of unauthorized access to its Quanum Lab Services Manager (LSM), the system some clients use to place lab test orders and receive and look up results. Quest believes some patient data in Quanum LSM was accessed and confirms PHI/PII was involved; the specific data affected is still being investigated. Quest paused access to Quanum LSM (and, as a precaution, Essential Insights and LabHQ, where no data was accessed), notified federal law enforcement and engaged outside experts. Core operations are not materially disrupted, and Quest says the incident is not related to the PHP vulnerabilities.

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