Lab testing giant Quest Diagnostics confirms patients' personal and health data was compromised during breach

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   Quest Diagnostics Confirms Cyber Breach Exposed Patient Data

   Medical testing giant Quest Diagnostics confirmed that a cyberattack exposed personal information and patient records after unauthorized access to its Quanum LSM system. The breach forced the company to temporarily shut down certain systems, though core operations remain unaffected. Quest stated the incident was unrelated to recent PHP program breaches. The intrusion makes Quest the latest healthcare technology company targeted by hackers in recent months, raising fresh concerns over medical data security and the vulnerability of digital health records.

   Why it matters

   The incident highlights ongoing cybersecurity vulnerabilities across the healthcare sector, which has faced a rising wave of cyberattacks targeting patient data and core testing systems. Because medical labs hold sensitive personal and health information, such breaches pose severe privacy risks for millions of patients. The attack on Quest Diagnostics follows a series of similar breaches impacting other healthcare technology firms.

   What is confirmed

   • Quest Diagnostics confirmed that patient data was accessed in a cybersecurity breach.
   • The cyberattack prompted temporary system shutdowns at Quest Diagnostics, though core operations remain unaffected.
   • The unauthorized access affected the company's Quanum LSM system.

   Still unconfirmed

   • The incident was entirely unrelated to recent PHP program breaches.

   What to watch next

   • Further disclosures from Quest Diagnostics detailing the exact number of affected patients
   • Official regulatory or law enforcement findings regarding the threat actor behind the Quanum LSM system breach
   Sources used for this update (15)

   1. Reuters — Laboratory operator Quest reports cyber breach affecting patient records
   2. The Washington Post — Major medical lab operator believes cyber breach exposed patient records
   3. Gizmodo — Quest Diagnostics Reports Unauthorized Access of Patient Records
   4. NBC News — Quest Diagnostics reports cyber breach affecting ‘certain patient records’
   5. Fox Business — Quest Diagnostics confirms patient information accessed in cyberattack, systems temporarily shut down
   6. LiveNOW from FOX — If you used Quest Diagnostics, your data may have been compromised: Here’s what happened
   7. TechCrunch — Lab testing giant Quest Diagnostics confirms patients' personal and health data was compromised during breach
   8. Chief Healthcare Executive — What health system leaders should know about PHP2Shell and Quest Diagnostics
   9. RamaOnHealthcare — Two cyber alerts in one week: What physicians need to do about PHP2Shell and the Quest Diagnostics breach
   10. www.foxbusiness.com — Quest Diagnostics confirms patient information accessed in cyberattack, systems temporarily shut down - Fox Business
   11. www.cnbc.com — Quest Diagnostics reports cyber breach of 'certain patient ...
   12. techcrunch.com — Lab testing giant Quest Diagnostics confirms patients ...
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