Summary
- Environment: Testing operations and order-management systems
- Operational impact: Temporary testing suspension; most systems restored
- Financial impact: No quantified cost disclosed
- Record status: Developing record. Reviewed November 7, 2026; updated as evidence emerges.
What happened
Myriad Genetics detected unauthorized access to its IT network on November 2, 2026 and temporarily suspended testing operations and order-management systems while responding. [1]
Impact
As of its November 5 filing, most systems had returned to normal. Myriad was still investigating the scope, including whether patient records had been accessed. [1]
Timeline
Intrusion detected and operations suspended
Myriad detected the intrusion and suspended testing and order-management systems. Source account.
[1]Filing reports most systems back to normal
The filing said most systems were operating normally while patient-record access remained under investigation. Source account.
[1]Briefing updated
This briefing was last reviewed and updated on November 7, 2026.
Threat Group & Attack Vector
The filing does not establish the initial access method, attacker identity or whether patient records were accessed.
Actors
- No threat actor group has been identified in the reviewed public evidence.
TTPs
- No specific MITRE ATT&CK technique is currently mapped for this case.
Response
Myriad reset certain credentials, engaged outside specialists and said it did not then believe the incident would materially adversely affect its business. [1]