Critical incident

Guardsquare: TLS certificate issues

Current status of Guardsquare: Operational — live Guardsquare status

Timeline

1. May 3, 2026, 20:58 UTC
   investigating
   The team is investigating connectivity issues from protected apps to ThreatCast and App Attestation related to TLS certificates.
2. May 3, 2026, 21:40 UTC
   identified
   This issue has been narrowed down to an unexpected change in the chain of trust of our TLS certificates.
3. May 3, 2026, 22:24 UTC
   monitoring
   We've mitigated the problem by issueing new certificates. The team will continue to monitor the situation.
4. May 4, 2026, 08:45 UTC
   monitoring
   We are still seeing impacted traffic from Android apps. The team continues to investigate the situation.
5. May 4, 2026, 10:00 UTC
   monitoring
   Android traffic has recovered as well.
6. May 4, 2026, 17:46 UTC
   resolved
   The issue is fully resolved now.

Updates as published by Guardsquare.