Data breach
Quest Diagnostics confirms data breach exposed patient records
At a glance
Low rather than Medium: UK relevance is 40 of 100, little UK-specific signal so far.
Briefing
- Do not treat uncorroborated claims as confirmed breaches.
Questions to ask IT
- Does this reporting name any supplier, product or service we rely on?
- Would our monitoring spot an attack like this, and who would we call if it did?
Next steps
- Confirm whether this affects systems or suppliers in your estate
No technical write-up beyond the summary below yet.
Next steps
- Check whether the affected organisation or service is in your estate or supply chain, and follow its guidance
Summary
- American clinical laboratory company Quest Diagnostics disclosed that patient records have been exposed after a threat actor gained unauthorised access to its Quanum LSM system.
Read the original reportBleepingComputer(opens in a new tab)
Pulse
Last checked 3d ago · Recheck overdue since 11 Nov 2026, 04:08 UK time · 3 quiet checks collapsed
- Story23 Oct 2026, 18:12 UK time · 23 Oct
Linked reporting from BleepingComputer (independent original reporting).
Read source (BleepingComputer)
1 entry so far. The timeline chart appears once this story has more history.
Sources
- BleepingComputerNews
Quest Diagnostics confirms data breach exposed patient records
How we know
Statements extracted from sources. Higher confidence means stronger corroboration.
- ClaimedHeadline60% confidence
Quest Diagnostics confirms data breach exposed patient records
- ProbableSummary fact75% confidence
American clinical laboratory company Quest Diagnostics disclosed that patient records have been exposed after a threat actor gained unauthorised access to its Quanum LSM system.