- Level
- confirmed
- Worst impact
- Partial outage
- Components
- Core Authentication Service
- Down Index
- 29of 100
What to do
Check whether you use Duo Security Core Authentication Service. Check your stack
Paste a package.json, lockfile, Terraform or a list of domains at down.guide/stack to see every provider you depend on.Confirm your retries, queues and scheduled jobs caught up after the 1h 42m it lasted.
Anything that failed between 2026-01-22 18:36 UTC and 2026-01-22 20:18 UTC may need a replay.Subscribe to Duo Security's feed to hear about the next one first. RSS feed
https://down.guide/feed?provider=duo works in Slack (/feed subscribe), Discord feed bots and any RSS reader.
Updates from Duo Security 2
- investigating
We are investigating an issue causing authentication failures on our DUO4 deployment. Please check back here or subscribe to updates for any changes.
provider
- resolved
The issue causing authentication failures on our DUO4 deployment has been resolved.
provider
Reports count in aggregate; nothing about you is shown.
Corrections
None so far.
Something wrong on this page? Report an error or send us a note. Every fix is listed here.
Questions about DWN-b44892e537
Is Duo Security still down?
No, this incident was resolved 2026-01-22 20:18 UTC. For Duo Security's live state, see https://down.guide/duo.
How long did it last?
1h 42m, from 2026-01-22 18:36 UTC to 2026-01-22 20:18 UTC, by the times Duo Security posted.
What was affected?
Duo Security named Core Authentication Service.
What caused it?
Duo Security hasn't published a root cause. If it does, it shows here.
Where does this come from?
Duo Security's official status page, https://status.duo.com, quoted verbatim. down.guide's own probes, reports and social counts are labeled as ours.