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CVE-2026-11858

HIGH
8.4
CVSS 4.0
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.

Metadata

CVE ID
CVE-2026-11858
State
PUBLISHED
Assigner
SEC-VLab
Reserved
2026-06-10 09:08 UTC
Published
2026-06-17 11:50 UTC
Last updated
2026-06-17 14:56 UTC
Primary CWE
CWE-862
CWE-862 Missing Authorization
Vendor / Product
Quanos Solutions GmbH / SCHEMA ST4
Sources
cve.org  ·  NVD

Severity & Metrics

8.4 HIGH CVSS 4.0
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
SSVC — CISA Coordinator
Exploitation
none
Automatable
no
Tech. Impact
total
Affected products (1)
VendorProductPlatformVersions
Quanos Solutions GmbH SCHEMA ST4 — SCHEMA ST4 on-premises, all versions
Weakness (CWE)
CWESourceDescription
CWE-862 cna CWE-862 Missing Authorization
CVSS scores (1)
ScoreSeverityVersionSourceVector
8.4 HIGH 4.0 cna CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
References (1)
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