Unauthenticated local account creation via XML deserialization
Published Jul 30, 2026 · Updated Jul 30, 2026
Deserialization in GSNamespace.dll in Gladinet CentreStack before 17.3 allows remote attackers to create arbitrary local OS accounts. The exposed import endpoints decode an attacker-controlled base64 XML StorageConfigure value and pass it to InternalImportAdUserByUPN(), leading GladinetCloudMonitor.exe to call NetUserAdd with attacker-chosen credentials. Requests require no authentication, and successful exploitation adds Windows users and creates attacker-selected server directories.
Summary
What happened
Deserialization in GSNamespace.dll in Gladinet CentreStack before 17.3 allows remote attackers to create arbitrary local OS accounts. The exposed import endpoints decode an attacker-controlled base64 XML StorageConfigure value and pass it to InternalImportAdUserByUPN(), leading GladinetCloudMonitor.exe to call NetUserAdd with attacker-chosen credentials. Requests require no authentication, and successful exploitation adds Windows users and creates attacker-selected server directories.
The record
- CVE
- CVE-2026-54365
- Published
- Jul 30, 2026
- Updated
- Jul 30, 2026
- Vendor
- Gladinet
- Product
- CentreStack
- Classifications
- CWE-306, T1136.001, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 30, 2026CVE publishedPublication date reported by the CVE source.
- Jul 30, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <17.3
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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