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

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...