CVE-2026-11858 Missing authorization in Quanos SCHEMA ST4 Client Update Service allows arbitrary file overwrite as SYSTEM

Quanos SCHEMA ST4 on-premises contains a local privilege escalation vulnerability in the Client Update Service. The update service runs as NT AUTHORITY\SYSTEM and exposes a .NET Remoting interface over a named pipe without sufficient access controls or authorization. A local authenticated...

CVE-2026-11858 Missing authorization in Quanos SCHEMA ST4 Client Update Service allows arbitrary file overwrite as SYSTEM

Quanos SCHEMA ST4 on-premises contains a local privilege escalation vulnerability in the Client Update Service. The update service runs as NT AUTHORITY\SYSTEM and exposes a .NET Remoting interface over a named pipe without sufficient access controls or authorization. A local authenticated...

CVE-2026-11858

Quanos SCHEMA ST4 on-premises is affected by a local privilege escalation due to insufficient authorization on the Client Update Service. The service, running as NT AUTHORITY\SYSTEM, exposes a .NET Remoting interface over a named pipe without proper access controls. A local authenticated low-priv...

CVE-2026-11857 Insecure .NET Remoting deserialization in Quanos SCHEMA ST4 Client Update Service allows local privilege escalation

Quanos SCHEMA ST4 on-premises contains a local privilege escalation vulnerability in the Client Update Service due to insecure deserialization in the .NET Remoting service. The service is configured with TypeFilterLevel.Full and is bound to local interfaces only through named pipes. A local...

CVE-2026-11857 Insecure .NET Remoting deserialization in Quanos SCHEMA ST4 Client Update Service allows local privilege escalation

Quanos SCHEMA ST4 on-premises contains a local privilege escalation vulnerability in the Client Update Service due to insecure deserialization in the .NET Remoting service. The service is configured with TypeFilterLevel.Full and is bound to local interfaces only through named pipes. A local...

CVE-2026-11857

The CVE describes a local privilege escalation in Quanos SCHEMA ST4 on-premises, via insecure deserialization in the .NET Remoting endpoint exposed by the Client Update Service. The service uses TypeFilterLevel.Full and binds to local interfaces over named pipes, enabling a local authenticated at...

CVE-2026-11858: Missing Authorization

Quanos SCHEMA ST4 on-premises contains a local privilege escalation vulnerability in the Client Update Service. The update service runs as NT AUTHORITY\SYSTEM and exposes a .NET Remoting interface over a named pipe without sufficient access controls or authorization. A local authenticated...

CVE-2026-11857: Deserialization of Untrusted Data

Quanos SCHEMA ST4 on-premises contains a local privilege escalation vulnerability in the Client Update Service due to insecure deserialization in the .NET Remoting service. The service is configured with TypeFilterLevel.Full and is bound to local interfaces only through named pipes. A local...

PT-2026-50381

Quanos SCHEMA ST4 on-premises contains a local privilege escalation vulnerability in the Client Update Service. The update service runs as NT AUTHORITYSYSTEM and exposes a .NET Remoting interface over a named pipe without sufficient access controls or authorization. A local authenticated...