Quest suspends Quanum after October 21 unauthorized access
October 23 coverage adds no later facts: the Quanum suspension and the dispute over whether records were taken were already known.
Quest has suspended Quanum after October 21 unauthorized access; whether patient data was taken, and how many people are affected, remain unresolved.
Quest Diagnostics said it found unauthorized access on October 21, 2026, to Quanum Lab Services Manager, used by healthcare clients to order laboratory tests and view results. It suspended Quanum, paused Essential Insights and LabHQ, and told some customers to use paper requisitions or Quanum eLabs, while direct laboratory and electronic medical record interfaces continued. GBHackers reports the Form 8-K does not say records were taken; TechCrunch says some protected health information was taken; BleepingComputer says some patient records were exposed but data types are still unknown. The patient count, attacker, and entry method are not public. Quest notified federal law enforcement, hired outside experts, and said the incident was not tied to recent PHP flaws; no group has claimed it, and no ransom is confirmed.
- Unauthorized access was found on October 21, 2026.
- Quanum was suspended; Essential Insights and LabHQ access was paused.
- Direct laboratory and electronic medical record interfaces stayed available.
- Patient count, data fields, attacker, and entry method are undisclosed.
- Quest says the incident is unrelated to recent PHP flaws.
- No ransomware, extortion demand, or claiming group is confirmed.
Timeline
dated events in the reporting · oldest first- Oct 21, 2026Quest learned of unauthorized access to Quanum · BleepingComputer
What each outlet adds
beyond the shared facts- GBHackersSays the October 21 Form 8-K does not confirm records were taken.
- TechCrunchReports some protected health information was taken; cites about 500,000 clinicians.
- BleepingComputerEssential Insights and LabHQ paused; paper requisitions or Quanum eLabs advised.
- SecurityWeekSays Quest told AP the breach is unrelated to PHP flaws.
- The RecordSystem taken offline Thursday; Quest expected restoration by Friday.
- Vendors
- Quest Diagnostics
- Victims
- Quest Diagnostics
- Organizations
- U.S. Securities and Exchange Commission
- Countries
- United States
Coverage
oldest first · one row per article · UTC- · 2d ago
Cyber Security NewsFirst report
Quest Diagnostics suspends Quanum LSM after unauthorized access
Quest found the intrusion on October 21 and confirmed patient information was involved, without stating how many people.
- · 2d ago
SecurityWeek
Quest Diagnostics reports breach of Quanum Lab Services Manager
The company says certain patient records were likely accessed, but the number of patients and record types are still unknown.
- · 2d ago
GBHackers
Quest Diagnostics says unauthorized party may have seen Quanum records
The October 21 Form 8-K does not say how many patients were affected or whether records were taken.
- · 2d ago
The Record
Quest Diagnostics warns of possible patient data theft after lab system attack
Quanum Lab Services Manager was taken offline Thursday; Quest expects it back Friday and says other operations were not hit.
- · 2d ago
TechCrunch · Security
Quest Diagnostics confirms patient data taken in Quanum breach
Quest says the Wednesday attack hit Quanum and took some protected health information; the number of patients is unstated.
- · 2d ago
BleepingComputer
Quest Diagnostics says Quanum LSM access exposed patient records
The lab learned of the access on October 21, has not named the data types, and found no group claiming the attack.