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CVE-2026-54366— CentreStack < 17.4 XXE via SharePoint Storage Configuration

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 17.4之前版本存在输入验证错误漏洞，该漏洞源于XML外部实体注入，允许未经身份验证的攻击者通过向SharePoint存储配置处理器提供恶意URL，发送特制请求到未认证的StorageConfig端点，导致服务器获取并解析包含外部DTD引用的攻击者控制XML，从而带外渗出包含数据库凭据和加密密钥的敏感文件如Web.config。

CVSS 7.5 · High EPSS 0.49% · P40

Affected Version Matrix 1

VendorProduct Version RangeStatus
Gladinet CentreStack < 17.4 affected
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I. Basic Information for CVE-2026-54366

Vulnerability Information
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Vulnerability Title
CentreStack < 17.4 XXE via SharePoint Storage Configuration
Source: CVE Program / CVE List V5
Vulnerability Description
CentreStack before 17.4 contains an XML external entity (XXE) injection vulnerability that allows unauthenticated attackers to exfiltrate arbitrary files by supplying a malicious URL to the SharePoint storage configuration handler. Attackers can send a crafted request to the unauthenticated StorageConfig endpoint causing the server to fetch and parse attacker-controlled XML containing external DTD references, resulting in out-of-band file exfiltration of sensitive files such as Web.config, which may contain database credentials and cryptographic key material.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
XML外部实体引用的不恰当限制(XXE)
Source: CVE Program / CVE List V5
Vulnerability Title
Gladinet CentreStack 输入验证错误漏洞
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 17.4之前版本存在输入验证错误漏洞，该漏洞源于XML外部实体注入，允许未经身份验证的攻击者通过向SharePoint存储配置处理器提供恶意URL，发送特制请求到未认证的StorageConfig端点，导致服务器获取并解析包含外部DTD引用的攻击者控制XML，从而带外渗出包含数据库凭据和加密密钥的敏感文件如Web.config。
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 ~ 17.4 -

II. Public POCs for CVE-2026-54366

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III. Intelligence Information for CVE-2026-54366

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Vendor Advisories for CVE-2026-54366 (1)

Vendor Pages for CVE-2026-54366 (1)

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

CVE-2026-54363 9.1 CRITICAL CentreStack < 17.5 Hardcoded Key Token Forgery RCE
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-2026-54365 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-611

V. Comments for CVE-2026-54366

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