Vulnerability Description
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 low-privileged user can connect to the interface and invoke privileged update methods such as Update(). This allows arbitrary file write and delete operations with SYSTEM privileges and can be used to achieve local privilege escalation.
Related Weaknesses (CWE)
References
FAQ
What is CVE-2026-11858?
CVE-2026-11858 is a documented vulnerability. 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 ove...
How severe is CVE-2026-11858?
CVSS scoring is not yet available for CVE-2026-11858. Check NVD for updates.
Is there a patch for CVE-2026-11858?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.