CVE-2026-54365: high-severity vulnerability in Gladinet CentreStack
CentreStack < 17.3 Unauthenticated User Creation via Deserialization in GSNamespace.dll
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.7epss 0.4%
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:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Affected products
Gladinet · CentreStackRelated CVEs — Gladinet CentreStack
In the same product, most dangerous first.
CVE-2025-30406CRITICALCVE-2025-30406EPSS 94.3%KEVCVE-2026-54368HIGHCentreStack < 17.4 SQL Injection via x-glad-filter HeaderEPSS 0.7%CVE-2026-54363CRITICALCentreStack < 17.5 Hardcoded Key Token Forgery RCEEPSS 0.7%CVE-2026-54366HIGHCentreStack < 17.4 XXE via SharePoint Storage ConfigurationEPSS 0.5%CVE-2026-54364MEDIUMCentreStack < 17.4 Session Injection via SelectProvider.aspxEPSS 0.4%CVE-2026-54367HIGHCentreStack < 17.2 Unauthenticated API Authorization BypassEPSS 0.3%