Duo Security incident
SMS Delivery Issues to Greece Phone Numbers
Duo Security experienced a minor incident on May 28, 2025 affecting SMS Message Delivery and SMS Message Delivery and 1 more component, lasting 2h. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- investigating May 28, 2025, 10:17 AM UTC
We are currently investigating an issue affecting SMS delivery to phone numbers in Greece. Please feel free to check back here or subscribe to updates for the latest information regarding any changes or resolutions.
- identified May 28, 2025, 11:09 AM UTC
While we have identified the issue causing SMS delivery failures in the Greece. We are waiting for a solution and will provide updates as they are available. During this time, please use alternate authentication methods such as Duo Push, Duo Mobile Passcodes, Hardware Tokens etc to login to your Duo-protected integrations.
- monitoring May 28, 2025, 11:42 AM UTC
We have implemented a workaround for the third-party issue with intermittent SMS delivery failures in Greece and are monitoring the results at this time.
- resolved May 28, 2025, 12:17 PM UTC
The third-party issue with intermittent SMS delivery failures for Greece has been resolved.