Quanos Solutions GmbH SCHEMA ST4

• CVE-2026-11858 High 8.4 Missing authorization in Quanos SCHEMA ST4 Client Update Service allows arbitrary file overwrite as SYSTEM 0.1%
• CVE-2026-11857 High 8.4 Insecure .NET Remoting deserialization in Quanos SCHEMA ST4 Client Update Service allows local privilege escalation 0.3%