CVE-2026-54365

HIGH

CentreStack < 17.3 Unauthenticated User Creation via Deserialization in GSNamespace.dll

Title source: cna
STIX 2.1

Description

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.

References (2)

Core 2

Scores

CVSS v3 7.5
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Details

CWE
CWE-306
Status published
Products (1)
Gladinet/CentreStack < 17.3
Published Jul 30, 2026
Tracked Since Jul 30, 2026