Duo - Partial Hardware Token Authentication Issues - United States

Incident Report for Duo

Resolved

This 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. If you continue to experience issues, please contact Duo Support.

Posted Sep 03, 2026 - 19:24 EDT

Monitoring

We have seen the failure rate for Duo hardware token authentication subside on affected US deployments.

Customers using hardware tokens may still experience intermittent authentication failures while we continue to monitor. Retrying the authentication attempt is expected to succeed. Other Duo authentication methods are not expected to be impacted and can be used as alternate methods if configured and available.

We will continue to monitor service stability and provide additional updates as needed.

Posted Sep 03, 2026 - 18:30 EDT

Investigating

We are investigating a partial outage affecting Duo hardware token authentication for customers on affected US deployments.

Customers using hardware tokens may experience intermittent authentication failures. Based on current information, retrying the authentication attempt is expected to succeed. Other Duo authentication methods are not expected to be impacted and can be used as alternate methods if configured and available.

Our engineering team is actively investigating and has started mitigation steps. Updates and additional details will be provided as new information becomes available.

We appreciate your patience and understanding during this time.

Posted Sep 03, 2026 - 18:04 EDT

This incident affected: DUO17 (Core Authentication Service), DUO22 (Core Authentication Service), DUO39 (Core Authentication Service), DUO40 (Core Authentication Service), DUO42 (Core Authentication Service), DUO9 (Core Authentication Service), DUO49 (Core Authentication Service), DUO50 (Core Authentication Service), DUO52 (Core Authentication Service), DUO55 (Core Authentication Service), DUO56 (Core Authentication Service), DUO58 (Core Authentication Service), DUO62 (Core Authentication Service), DUO63 (Core Authentication Service), DUO65 (Core Authentication Service), DUO72 (Core Authentication Service), DUO73 (Core Authentication Service), DUO74 (Core Authentication Service), DUO75 (Core Authentication Service), DUO76 (Core Authentication Service), DUO77 (Core Authentication Service), DUO78 (Core Authentication Service), and DUO61 (Core Authentication Service).