Quest Diagnostics discloses unauthorized access to Quanum LSM
Original title: Quest Diagnostics Incorporated notifies SEC of Incident
The October 21 filing says some patient records were accessed but operations were not materially disrupted.
Quest Diagnostics told the SEC in an October 21, 2026 Form 8-K that it learned that day of unauthorized access to Quanum LSM, used by some clients to place test orders and receive or look up results. The company started incident response, notified federal law enforcement, and hired outside cybersecurity experts. It says it believes an unauthorized party accessed certain patient records, while the full scope remains under investigation. Quest says the incident has not materially disrupted operations or patient care.
Unconfirmed: Quest says the full scope of access is still under investigation.
- Quanum LSM is used to place orders and view test results.
- Quest says it contained the activity and began an investigation.
- Federal law enforcement and external experts were engaged.
- The company cautions that statements about impact may be forward-looking.
Impact: Unauthorized access to certain patient records
- Products
- Quanum LSM
- Victims
- Quest Diagnostics
- Organizations
- SEC
From the original article
3 min read at databreaches.netFrom Quest Diagnostics Incorporated 8-K filing on October 21, 2o26: 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 Company promptly initiated its cybersecurity incident response procedures to contain the activity, assess...
By Dissent · databreaches.net
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