- Level
- confirmed
- Worst impact
- Degraded
- Components
- Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service
- Regions
- us
- Down Index
- 23of 100
What to do
Check whether you use Duo Security Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service and 75 more in us. 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 54m it lasted.
Anything that failed between 2026-01-21 21:38 UTC and 2026-01-21 23:32 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 3
- investigating
We are currently investigating an issue causing authentication failures with the authentications for newly created MSP sub-accounts on all of our deployments and are working to correct the issue as soon as possible. Please check back here or subscribe to updates for any changes.
provider
- identified
We have identified the cause of authentication failures for newly created MSP sub-accounts and are working to correct the issue as soon as possible. Please check back here or subscribe to updates for any changes.
provider
- resolved
We have identified the cause of the issue for authentication failures with newly created MSP Sub-accounts on all our deployments and remediation steps have been applied to correct this. If you continue to experience any additional issues related to this, please contact us at https://duo.com/support referencing this incident, (https://status.duo.com/incidents/tymgyq32v7dw).
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-b0dab48b16
Is Duo Security still down?
No, this incident was resolved 2026-01-21 23:32 UTC. For Duo Security's live state, see https://down.guide/duo.
How long did it last?
1h 54m, from 2026-01-21 21:38 UTC to 2026-01-21 23:32 UTC, by the times Duo Security posted.
What was affected?
Duo Security named Core Authentication Service, Core Authentication Service, Core Authentication Service, Core Authentication Service and 75 more in us.
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.