Summary:

On February 12, 2026, our authentication system experienced a temporary service disruption due to an unexpected failure of the Kubernetes master node.

Impact:

During this period, the administrative front-end interface was unavailable, preventing administrators from accessing the management console.

It is important to note that corporate services were not affected. Specifically:

• Email tracking (opened emails, clicked links, submissions, etc.) continued to function normally.

• Campaign delivery and tracking mechanisms remained fully operational.

• No data loss occurred.

The issue was isolated to the authentication layer serving the admin front-end.

Root Cause:

The disruption was caused by a crash of the Kubernetes master node, which temporarily impacted the authentication service responsible for admin access.

Resolution:

The Kubernetes master node was restored and stabilized. Network and cluster services were verified, and full functionality of the authentication system was successfully restored.

Preventive Actions:

Additional monitoring and stabilization measures have been implemented to reduce the likelihood of similar disruptions in the future.

If you require any further details, please feel free to contact us.