HIGHVulnerability
Verified
Global

NVD HIGH: CVE-2026-54365 — CentreStack before 17.3 contains an unauthenticated deserialization vulnerabilit...

·Source: NIST NVD

Updated:

Executive Summary

CentreStack before 17.3 contains an unauthenticated deserialization vulnerability in GSNamespace.dll that allows unauthenticated attackers to create arbitrary local OS user accounts by supplying a crafted base64-encoded XML string to exposed API endpoints. Attackers can send a malicious StorageConfigure parameter to the jsonimportuserbyupn, jsonimportuserbyupnex, or japiimportuserbyupn endpoints t

Analysis

CentreStack before 17.3 contains an unauthenticated deserialization vulnerability in GSNamespace.dll that allows unauthenticated attackers to create arbitrary local OS user accounts by supplying a crafted base64-encoded XML string to exposed API endpoints. Attackers can send a malicious StorageConfigure parameter to the jsonimportuserbyupn, jsonimportuserbyupnex, or japiimportuserbyupn endpoints to trigger InternalImportAdUserByUPN(), causing GladinetCloudMonitor.exe to invoke the NetUserAdd Windows API with attacker-controlled credentials and create arbitrary directories on the server filesystem. CVSS Score: 7.5. Published: 2026-07-30T13:16:51.503.

Indicators of Compromise (1)

CVE (1)
CVE-2026-54365
NVDMITRE CVE
Source Attribution

Originally published by NIST NVD on Jul 30, 2026. Verified by: NIST.

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