CVE WatchJul 30, 2026

CVE-2026-54365

CentreStack before 17.3 contains an unauthenticated deserialization vulnerability in GSNamespace.dll that allows unauthenticated attackers t

CVSS

7.5

High

EPSS

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KEV

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Exploit Today

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0-100

Published: Jul 30, 2026 · Last modified: Jul 30, 2026 · CWE-306

EPSS · 30d

Not enough EPSS history yet.

Technical 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.

Official references

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