Arctic Wolf experienced a critical incident on August 6, 2026 affecting Managed Detection and Response-Sensor Infrastructure and Managed Detection and Response-Sensor Infrastructure, lasting 1d. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- investigating Aug 06, 2026, 01:46 PM UTC
We are aware of an issue affecting ESET Sensor connectivity. Users may receive "Invalid Credentials" error messages for affected Sensors. Our team has been alerted and is investigating the issue . Next Update: 08/06/26 15:00 UTC
- investigating Aug 06, 2026, 03:08 PM UTC
We are continuing to investigate the issue which is affecting ESET Sensor connectivity.. Users may continue to receive "Invalid Credentials" error messages for affected Sensors. Next Update: 08/06/26 16:00 UTC
- investigating Aug 06, 2026, 04:04 PM UTC
We are continuing to investigate the issue which is affecting ESET Sensor connectivity.. Users may continue to receive "Invalid Credentials" error messages for affected Sensors. Next Update: 08/06/26 18:00 UTC
- monitoring Aug 06, 2026, 06:07 PM UTC
Vendor ESET have implemented a fix for the affected Sensors. Arctic Wolf is currently validating the recovery and stability of the services from our end. Next Update: 08/06/26 20:00 UTC
- monitoring Aug 06, 2026, 07:17 PM UTC
Vendor ESET have implemented a fix for the affected Sensors. Arctic Wolf will be validating the recovery and stability of the services overnight. Next Update: 08/07/26 16:00 UTC
- resolved Aug 07, 2026, 02:14 PM UTC
Arctic Wolf resources have verified recovery of ESET Cloud sensors Connectivity. The incident is resolved.