PT-2026-50381 · Quanos Solutions Gmbh · Schema St4

Published 2026-06-17 · Updated 2026-06-17 · CVE-2026-11858

Mitre

CVSS v4.0

8.4

High

Base vector

AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

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 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.

Fix

Missing Authorization

Weakness Enumeration

CWE-862

Related Identifiers

CVE-2026-11858

Affected Products

Schema St4

References · 1

• https://r.sec-consult.com/quanos · Note