DDoS Attack Impacting ACS Service Availability

Incident Report for Entersekt

Resolved

We are currently investigating a Distributed Denial of Service (DDoS) attack that is affecting our **ACS and MPI** services. Our engineering and security teams are actively working to mitigate the impact and restore normal operations.

Users may experience an increase in transactions resulting in statuses of U - Unavailable, Auth error, or Rejected due to a Distributed Denial of Service (DDoS) attack targeting our infrastructure.

We will provide updates as more information becomes available and as we implement mitigation strategies.

Posted May 16, 2025 - 08:01 UTC

This incident affected: Omni-channel Authentication (Customer Authentication - US) and 3DS & Payment Authentication (3DS ACS - US).