---
title: "Myriad Genetics network intrusion"
description: "Myriad Genetics detected network intrusion on November 2, temporarily suspended testing and order systems, and continued assessing patient-data access."
incident_type: "Cybersecurity incident"
status: "active"
last_modified: "2026-11-07"
canonical_url: "https://www.ally.security/incidents/myriad-genetics-network-intrusion-2026"
markdown_url: "https://www.ally.security/incidents/myriad-genetics-network-intrusion-2026.md"
stix_url: "https://www.ally.security/incidents/myriad-genetics-network-intrusion-2026/stix.json"
---

# Myriad Genetics network intrusion

Myriad Genetics detected network intrusion on November 2, temporarily suspended testing and order systems, and continued assessing patient-data access.

Last modified Nov 7, 2026 · 1 source

## Summary

- **Environment:** Testing operations and order-management systems
- **Operational impact:** Temporary testing suspension; most systems restored
- **Financial impact:** No quantified cost disclosed

## What happened

[Myriad Genetics](https://myriad.com/) detected unauthorized access to its IT network on November 2, 2026 and temporarily suspended testing operations and order-management systems while responding. [1](#source-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](#source-1)

## Timeline

### November 2, 2026 — Intrusion detected and operations suspended

Myriad detected the intrusion and suspended testing and order-management systems. [Source account](https://www.sec.gov/Archives/edgar/data/899923/000162828026070659/mygn-20261102.htm). [1](#source-1)

### November 5, 2026 — Filing reports most systems back to normal

The filing said most systems were operating normally while patient-record access remained under investigation. [Source account](https://www.sec.gov/Archives/edgar/data/899923/000162828026070659/mygn-20261102.htm). [1](#source-1)

### November 7, 2026 — 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](#source-1)

## Assets

[Download the case-scoped STIX 2.1 bundle](<https://www.ally.security/incidents/myriad-genetics-network-intrusion-2026/stix.json>)

## Sources

Primary source records used to research this incident.

<a id="source-1"></a>

### Myriad Genetics Form 8-K, November 5, 2026

regulatory · Myriad Genetics, Inc. · Nov 5, 2026

<https://www.sec.gov/Archives/edgar/data/899923/000162828026070659/mygn-20261102.htm>

<details>
<summary>Evidence ledger</summary>

Review the supporting structured claims.

1. **Occurred At · 100% confidence · current**  
   Intrusion detected and operations suspended: 2026-11-02
2. **Discovered At · 100% confidence · current**  
   Myriad Genetics network intrusion: 2026-11-02
3. **Resulted In · 100% confidence · current**  
   Myriad Genetics network intrusion: Intrusion detected and operations suspended
4. **Resulted In · 100% confidence · current**  
   Myriad Genetics network intrusion: Filing reports most systems back to normal
5. **Resulted In · 100% confidence · current**  
   Myriad Genetics network intrusion: 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.
6. **Affected Organization · 100% confidence · current**  
   Myriad Genetics network intrusion: Myriad Genetics, Inc.
7. **Resulted In · 100% confidence · current**  
   Myriad Genetics network intrusion: Myriad reset certain credentials, engaged outside specialists and said it did not then believe the incident would materially adversely affect its business.
8. **Resulted In · 100% confidence · current**  
   Myriad Genetics network intrusion: Myriad Genetics detected unauthorized access to its IT network on November 2, 2026 and temporarily suspended testing operations and order-management systems while responding.
9. **Occurred At · 100% confidence · current**  
   Filing reports most systems back to normal: 2026-11-05
10. **Disclosed At · 100% confidence · current**  
   Myriad Genetics network intrusion: 2026-11-05

</details>