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● Covered by 4 sources · 4 reportsMedium impact2 negative2 neutral

Quest Diagnostics Reports Cyber Breach of Patient Records on Quanum Lab Services Manager

🔄 Updated 14d ago — new reporting from The Record, TechCrunch, BleepingComputer
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Key points

  • Unauthorized access to Quanum Lab Services Manager discovered Wednesday.
  • Certain patient records likely compromised; full scope under investigation.
  • Federal law enforcement notified; external cybersecurity experts assisting.
  • Breach is not related to recent PHP vulnerabilities.
  • Quest Diagnostics took its Quanum Lab Services Manager system offline on Thursday.
  • The Quanum Lab Services Manager system is used for ordering and receiving medical test results.
  • Quest Diagnostics published a statement and an FAQ about the cyberattack.
  • Customers can use paper requisitions in place of the system.
  • Quest pledged to have Quantum back up and running by Friday.
  • Quest Diagnostics filed an 8-K with the U.S. Securities and Exchange Commission.
  • The company learned about the breach on October 21.
  • Quest Diagnostics operates 7,700 points across North America.
  • Quest Diagnostics employs 65,000 people.
  • Quest Diagnostics generates more than $11 billion in annual revenue.
  • Quest Diagnostics serves one in three U.S. adults each year.

Unauthorized Access to Patient Platform

Medical laboratory operator Quest Diagnostics announced a cyber breach affecting its Quanum Lab Services Manager. This platform allows clients to place test orders and access patient results. The company identified the unauthorized access on Wednesday and promptly informed federal law enforcement agencies.

Scope of Compromise Under Investigation

Quest Diagnostics believes that "certain patient records" were accessed during the incident. However, the exact number of affected patients and the specific types of records compromised are still unknown. The New Jersey-based company is collaborating with external cybersecurity experts to determine the full extent of the breach.

Past Security Incidents

This is not the first time Quest Diagnostics has experienced data breaches involving patient information. In 2016, approximately 34,000 individuals had their lab results and contact information exposed. Another incident in 2019, involving a third-party billing service provider, American Medical Collection Agency, affected personal information for about 11.9 million Quest patients.

Unrelated to Recent PHP Vulnerabilities

Quest Diagnostics confirmed that this cyber breach is not connected to the recently discovered vulnerabilities in the PHP programming language. These PHP vulnerabilities, which affect a significant portion of websites globally, have prompted widespread patching efforts across various industries.

Updates

🕒 2026-10-23 · new reporting from The Record, TechCrunch, BleepingComputer
  • Quest Diagnostics took its Quanum Lab Services Manager system offline on Thursday.
  • The Quanum Lab Services Manager system is used for ordering and receiving medical test results.
  • Quest Diagnostics published a statement and an FAQ about the cyberattack.
  • Customers can use paper requisitions in place of the system.
  • Quest pledged to have Quantum back up and running by Friday.
  • Quest Diagnostics filed an 8-K with the U.S. Securities and Exchange Commission.
  • The company learned about the breach on October 21.
  • Quest Diagnostics operates 7,700 points across North America.
  • Quest Diagnostics employs 65,000 people.
  • Quest Diagnostics generates more than $11 billion in annual revenue.
  • Quest Diagnostics serves one in three U.S. adults each year.

✨ This summary was generated by AI from the outlets' reporting listed below. It is not independently verified and may contain errors — check the original sources. How BrevFeed works →

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How outlets covered it

Quest Diagnostics disclosed a data breach where an unauthorized actor accessed its Quanum LSM system, potentially exposing patient records. The company is investigating the scope of the incident and has temporarily paused access to other systems as a precautionary measure.

Quest Diagnostics confirmed a cyberattack on its Quanum lab testing system, resulting in unauthorized access to patient records. This incident is part of a trend of cyberattacks targeting the healthcare industry, where financially motivated criminals aim to steal sensitive data.

Quest Diagnostics took its Quanum Lab Services Manager system offline after discovering unauthorized access, leading to a belief that some patient data was accessed. This system is used for ordering and receiving medical test results, impacting operations for one of the largest clinical laboratory companies in the U.S.

Quest Diagnostics reported unauthorized access to its Quanum Lab Services Manager platform, potentially compromising certain patient records. The company discovered the breach on Wednesday and is investigating the scope of affected data and patients, while working with federal law enforcement and cybersecurity experts.