# \[DUO4\] Authentication Failures

- Provider: [Duo Security](https://down.guide/duo)
- Level: confirmed
- Impact: Partial outage
- lasted 1h 42m
- started 2026-01-22 18:36 UTC
- Core Authentication Service
- id: DWN-b44892e537
- Official page: https://stspg.io/wv8bv5ypbr1y

## Updates from Duo Security
### 2026-01-22 18:36 UTC: investigating
We are investigating an issue causing authentication failures on our DUO4 deployment.
Please check back here or subscribe to updates for any changes.

### 2026-01-22 20:18 UTC: resolved
The issue causing authentication failures on our DUO4 deployment has been resolved.

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