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CVE-2026-54363— CentreStack < 17.5 Hardcoded Key Token Forgery RCE

Quick assessment

Affected
Gladinet CentreStack
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Gladinet centrestack是美国Gladinet公司的一个文件同步与协作平台。 Gladinet CentreStack 17.5之前版本存在加密问题漏洞，该漏洞源于硬编码加密密钥，允许未认证攻击者利用静态SysNumber值伪造加密令牌，从而构造有效x-glad-auth头并调用特权API端点获取域管理员IdentityTicket，实现远程代码执行。

CVSS 9.1 · Critical EPSS 0.69% · P51

Affected Version Matrix 1

VendorProduct Version RangeStatus
Gladinet CentreStack < 17.5 affected
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I. Basic Information for CVE-2026-54363

Vulnerability Information
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Vulnerability Title
CentreStack < 17.5 Hardcoded Key Token Forgery RCE
Source: CVE Program / CVE List V5
Vulnerability Description
CentreStack before 17.5 contains a hardcoded cryptographic key vulnerability that allows unauthenticated attackers to forge arbitrary encrypted tokens by exploiting a static SysNumber value used as entropy for AccessTicket.Encrypt() and AccessTicket.Decrypt() across all installations. Attackers can use the hardcoded key to craft valid x-glad-auth headers and call privileged API endpoints such as acquiretenantbackuptoken to obtain a domain administrator IdentityTicket, enabling a complete unauthenticated remote code execution chain.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用硬编码的密码学密钥
Source: CVE Program / CVE List V5
Vulnerability Title
Gladinet CentreStack 加密问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Gladinet centrestack是美国Gladinet公司的一个文件同步与协作平台。 Gladinet CentreStack 17.5之前版本存在加密问题漏洞，该漏洞源于硬编码加密密钥，允许未认证攻击者利用静态SysNumber值伪造加密令牌，从而构造有效x-glad-auth头并调用特权API端点获取域管理员IdentityTicket，实现远程代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Gladinet CentreStack 0 ~ 17.5 -

II. Public POCs for CVE-2026-54363

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III. Intelligence Information for CVE-2026-54363

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Vendor Pages for CVE-2026-54363 (1)

Other References for CVE-2026-54363 (1)

Same Patch Batch · Gladinet · 2026-07-30 · 6 CVEs total

CVE-2026-54368 8.8 HIGH CentreStack < 17.4 SQL Injection via x-glad-filter Header
CVE-2026-54367 8.6 HIGH CentreStack < 17.2 Unauthenticated API Authorization Bypass
CVE-2026-54366 7.5 HIGH CentreStack < 17.4 XXE via SharePoint Storage Configuration
CVE-2026-54365 7.5 HIGH CentreStack < 17.3 Unauthenticated User Creation via Deserialization in GSNamespace.dll
CVE-2026-54364 6.5 MEDIUM CentreStack < 17.4 Session Injection via SelectProvider.aspx

IV. Related Vulnerabilities

Same product: CentreStack
Same vendor: Gladinet
Same weakness: CWE-321

V. Comments for CVE-2026-54363

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