Cisco Umbrella incident

Cisco Umbrella - DNS Policy issue - Global

Resolved after 4 hours 8 minutes, affecting DNS, on August 20, 2026.

resolved Aug 20, 2026, 07:26 AM UTC

The issue affecting incorrectly categorized DNS Tunneling VPN issue for some domains has been resolved. All services are now operating normally. We apologize for any inconvenience caused and thank you for your patience. We’re Here to Help If you have any questions, please contact our support team. Thank you for your understanding as we improve your Cisco Secure Access experience.

Started
Aug 20, 2026, 03:18 AM UTC
Resolved
Aug 20, 2026, 07:26 AM UTC
Duration
4h 8m
Detected by Pingoru
Aug 20, 2026, 03:18 AM UTC

Affected components

DNS

Update timeline

  1. investigating Aug 20, 2026, 03:18 AM UTC

    We are investigating a potential issue with DNS service affecting customers connecting globally. Some Domains may be incorrectly categorised as DNS Tunneling VPN. Our engineering team is actively working to confirm the impact, identify the root cause, and implement a resolution.Updates and additional details will be provided as new information becomes available.

  2. monitoring Aug 20, 2026, 04:29 AM UTC

    The team is actively monitoring the environment to validate service stability. We will provide a update once the incident has been fully resolved.

  3. resolved Aug 20, 2026, 07:26 AM UTC

    The issue affecting incorrectly categorized DNS Tunneling VPN issue for some domains has been resolved. All services are now operating normally. We apologize for any inconvenience caused and thank you for your patience. We’re Here to Help If you have any questions, please contact our support team. Thank you for your understanding as we improve your Cisco Secure Access experience.

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