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StoryData breachhigh

Quest says unauthorized access hit Quanum lab records platform

2 sources · 2 articlesFirst reported Updated ()
What's new

First merged summary.

Merged summary · x-ai/grok-4.7 · rewritten as coverage arrivesSummaries by Vani AI

Quest is investigating October 21 unauthorized access to Quanum Lab Services Manager and has not yet counted affected patients.

Quest Diagnostics said an unauthorized party accessed Quanum Lab Services Manager, also called Quanum LSM, a platform some providers use to order laboratory tests and view or receive results. The company learned of the access on October 21, 2026, and that day filed a Form 8-K with the SEC. It paused access to the platform, started incident response, notified federal law enforcement, and hired outside cybersecurity experts. Quest says personal information, health information, and certain patient records were accessed, but it has not published a patient count or a full list of data fields. Core operations and patient care were not materially disrupted, and notifications to patients, providers, and health plans are planned after the investigation.

Key facts
  • Quest discovered the Quanum LSM access on October 21, 2026.
  • The platform is used to place orders and look up test results.
  • Access to the platform was paused and the activity contained.
  • Federal law enforcement and outside cybersecurity experts were engaged.
  • No patient total or complete list of exposed fields has been published.
  • Notification letters are expected to include credit and identity monitoring.
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Timeline

dated events in the reporting · oldest first
  1. Oct 21, 2026Quest learned of unauthorized access to Quanum LSM. · Malwarebytes Labs
  2. Oct 21, 2026Quest filed a Form 8-K notifying the SEC. · DataBreaches.net

What each outlet adds

beyond the shared facts
  • Malwarebytes LabsPlatform paused; PII and health data involved; monitoring in planned notices.
  • DataBreaches.netOctober 21 Form 8-K; law enforcement and outside experts engaged.
Products
Quanum LSMQuanum Lab Services Manager
Victims
Quest Diagnostics
Organizations
SEC
Countries
United States

Coverage

oldest first · one row per article · UTC
  1. · 4d ago Malwarebytes LabsFirst report

    Quest confirms unauthorized access to lab-ordering patient records

    Quest learned on October 21 that its Quanum Lab Services Manager was accessed and has not yet counted affected patients.

  2. · 3d ago DataBreaches.net

    Quest Diagnostics discloses unauthorized access to Quanum LSM

    The October 21 filing says some patient records were accessed but operations were not materially disrupted.