CVE Explorer
CVE-2026-11857
Quanos SCHEMA ST4 on-premises contains a local privilege escalation vulnerability in the Client Update Service due to insecure deserialization in the .NET Remoting service. The service is configured with TypeFilterLevel.Full and is bound to local interfaces only through named pipes. A local authenticated attacker can connect to the local named pipe, obtain the .NET Remoting endpoint, and send specially crafted serialized objects. Successful exploitation results in arbitrary code execution in the
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"defaultStatus":"affected","product":"SCHEMA ST4","vendor":"Quanos Solutions GmbH","versions":[{"status":"affected","version":"SCHEMA ST4 on-premises, all versions","versionType":"custom"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:6f6ccbc7176a1d8477d075c0154ecf362402b7eaaada7f9c5ab3ddebbd98950f · sha256:490a636064e91c29… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"LOCAL","baseScore":8.4,"baseSeverity":"HIGH","exploitMaturity":"NOT_DEFINED","privilegesRequired":"LOW","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"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","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"HIG…
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:6f6ccbc7176a1d8477d075c0154ecf362402b7eaaada7f9c5ab3ddebbd98950f · sha256:490a636064e91c29… · /containers/cna/metrics/0/cvssV4_0
CWE assertions
1 source assertion{"cweId":"CWE-502","description":"CWE-502 Deserialization of untrusted data","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:6f6ccbc7176a1d8477d075c0154ecf362402b7eaaada7f9c5ab3ddebbd98950f · sha256:490a636064e91c29… · /containers/cna/problemTypes/0/descriptions/0
Source references
1 source assertion{"url":"https://r.sec-consult.com/quanos"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:6f6ccbc7176a1d8477d075c0154ecf362402b7eaaada7f9c5ab3ddebbd98950f · sha256:490a636064e91c29… · /containers/cna/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.