Duo Security Outage History

29 incidents recorded over the last 365 days, 28 of them resolved. Durations are measured from when PulsAPI first saw the problem to when it cleared, which is usually longer than the vendor's own figure.

Live Duo Security status100.00% uptime history

Every Recorded Duo Security Incident

Duo Security incidents, newest first, with date, duration and status.
DateIncidentDurationStatus
Sep 3, 2026Duo - Partial Hardware Token Authentication Issues - United StatesThis issue has been resolved. Duo hardware token authentication is now functioning normally on affected US deployments. Other Duo authentication methods were not expected to be impacted. Thank you for your patience…1h 19mResolved
Aug 10, 2026New Signups UnavailableThis incident has been resolved. New Duo account registrations are now functioning normally. Thank you for your patience. If you continue to experience issues, please contact Duo Support.2h 12mResolved
Aug 8, 2026Duo Phone Call Authentication Failures - United StatesPhone call authentication delivery for customers in the United States has returned to normal operation. If customers continue to experience issues, please contact Duo Support.2h 54mResolved
Jul 23, 2026VoIP and SMS Delivery Issues in IsraelThe SMS and VoIP delivery issue affecting users in Israel has been resolved. If customers continue to experience issues, please contact Duo Support.98h 38mResolved
Jul 7, 2026Duo - Phone call and SMS authentication issues - AustraliaThe third-party carrier issue affecting VoIP and SMS services in the Australia region has been resolved. Phone call and SMS authentication services are operating normally. We appreciate your patience and understanding…15h 46mResolved
Jun 23, 2026UAE Telephony SMS issueThe SMS delivery issue affecting the UAE region has been resolved.   Our team has verified that SMS services are operating normally and full functionality has been restored. Thank you for your patience while we resolved…10h 22mResolved
Jun 10, 2026AI Assistant Service Disruption in US-W1The issue affecting AI Assistant functionality in the US-W1 region has been resolved. Our team has verified that services are operating normally, and monitoring has confirmed system stability. Thank you for your…1h 17mResolved
May 18, 2026All US Deployments: AI Assistant failuresThe issue affecting AI Assistant functionality across all US deployments has been resolved, and full functionality has been restored. We will continue to monitor service performance to ensure stability.1h 53mResolved
May 13, 2026Authentication failuresThe issue causing authentication failures on DUO57 with the Duo Core Authentication Service is now resolved and full functionality has been restored.2h 41mResolved
May 7, 2026AI Assistant First-Time Access Failures for EU AdministratorsThe issue affecting first-time access to the AI Assistant for administrators in the EU has been fully resolved, and normal functionality has been restored.8h 23mResolved
Apr 30, 2026Desktop Authenticator Enrollment DegradationThe issue has been resolved. Services have returned to normal operation, and customers should no longer experience delays or failures. We apologize for any inconvenience caused and thank you for your patience.13 minResolved
Apr 28, 2026Elevated Authentication Latency in DUO6The issue causing elevated authentication latency has been fully resolved. Authentication performance has returned to normal levels, and customers should no longer experience delays during login attempts.1h 3mResolved
Apr 18, 2026SMS Delivery FailuresThe SMS delivery issue impacting customers in the US region has been resolved. SMS passcode authentication is now functioning normally. We apologize for any inconvenience caused and thank you for your patience.2h 39mResolved
Apr 1, 2026Scheduled Maintenance: Duo Root Certificate Authority Bundle ReplacementThe scheduled maintenance has been completed.199h 0mScheduled
Mar 22, 2026Duo Phone Call Authentication Failure for US Based CarriersVoIP authentication has returned to normal operation with sustained success rates observed.4h 10mResolved
Mar 22, 2026Duo Phone Call Authentication Failure for US Based CarriersVoIP authentication has returned to normal operation with sustained success rates observed.3h 15mResolved
Mar 2, 2026Service Outage on DUO81The service outage affecting DUO81 has been resolved. All impacted customers have been successfully migrated to an alternative Duo deployment. This migration has restored full service functionality for all affected…39h 16mResolved
Mar 1, 2026Service degradation on DUO81The issue was resolved by rerouting traffic.3h 9mResolved
Feb 23, 2026All Deployments - Entra 504 Gateway Timeouts# Summary On February 23, 2026, US-based users utilizing the Duo integration with Azure Identity management experienced increased authentication failures and timeouts. These errors were occurring specifically when…2h 47mResolved
Feb 23, 2026[US Deployments]: Duo Phone Call Authentication Failures for US RegionThe issue causing an abnormal phone call authentication success rate has been resolved by the third-party carrier.4h 17mResolved
Feb 19, 2026[Multiple Deployments] AI Assistant not available in IndiaThe issue causing the AI Assistant to be unavailable for administrators in India has been resolved.3h 15mResolved
Feb 19, 2026[All Deployments] AI Assistant Outage for new usersThe deployed fix for this incident has resolved the issue. We will continue to monitor these results.7h 56mResolved
Feb 18, 2026[All Deployments] AI Assistant Outage for new usersThe issue causing the failures for administrators access of the AI Assistant is now resolved and full functionality is restored. We will be posting a root-cause analysis (RCA) here once our engineering team has…7h 3mResolved
Feb 4, 2026All Deployments: Duo Enrollment URL Session Expired Errors# **Enrollment Timeout Outage** Incident Report – 02/04/2026 ## Summary A recent software update Duo made related to certificate security improvements inadvertently changed the order of operations for user sessions…6h 16mResolved
Jan 22, 2026[DUO4] Authentication FailuresThe issue causing authentication failures on our DUO4 deployment has been resolved.1h 42mResolved
Jan 21, 2026All Deployments: Authentication Failures for Newly Created MSP Sub-AccountsWe 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…1h 54mResolved
Jan 14, 2026SMS, Phone Call, Push delivery failures due to ongoing carrier outagesAccording to our telephony service provider, the issue affecting SMS, Phone Call, and Push delivery has been resolved. Currently our services are now back to normal.10h 40mResolved
Dec 23, 2025Duo Support Phone System IssueThe issue affecting call connectivity between customers and our Support Engineers has been resolved.1h 23mResolved
Dec 19, 2025New Duo Trial Signup FailuresThe issue affecting Duo Trial signups has been resolved.3h 3mResolved

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How to Read This Duo Security Incident Log

Each row is an incident PulsAPI observed, not a summary written afterwards. The duration is wall-clock time between the first failing check and the first clean one, so it includes the window before Duo Security acknowledged anything. Vendor post-mortems typically measure from acknowledgement, which is why their numbers are usually shorter.

Incidents still open have no duration yet and are listed as ongoing rather than being given a running total. The archive covers the last 365 days; anything older has aged out of the window rather than never having happened.

The longest single Duo Security outage in this window ran 8d 7h, against a mean recovery of 15h 28m. If you depend on Duo Security in a customer-facing path, the longest figure is the one to design around. The mean is what happens on a normal bad day; the maximum is what happens on the worst one.