Duo Security experienced a minor incident on July 23, 2026, lasting 4d 2h. The incident has been resolved; the full update timeline is below.
Update timeline
- investigating Jul 23, 2026, 06:02 PM UTC
We are investigating an issue affecting VoIP and SMS message delivery for users in Israel. The issue is related to an upstream carrier. Our team is working with our providers to investigate and restore normal service. Where available, users can use alternative authentication methods such as Duo Push. We will provide updates as more information becomes available.
- monitoring Jul 23, 2026, 06:39 PM UTC
We have implemented a change to address the SMS and VoIP delivery issue affecting users in Israel. SMS and VoIP delivery have recovered, and we are monitoring to confirm continued stability.
- monitoring Jul 24, 2026, 03:53 PM UTC
Error rates for SMS and VoIP delivery in Israel have reduced following the implemented change. We are continuing to monitor service behavior and investigate reports of intermittent failures affecting some customers. We will provide another update as more information becomes available.
- resolved Jul 27, 2026, 08:41 PM UTC
The SMS and VoIP delivery issue affecting users in Israel has been resolved. If customers continue to experience issues, please contact Duo Support.