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CVE-2026-11423— Path Traversal in Altium Enterprise Server Collaboration Service Allows Privilege Escalation

Quick assessment

Affected
Altium Altium Enterprise Server
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.

Altium Enterprise Server是美国Altium公司的一款本地化数据管理服务器。 Altium Enterprise Server存在安全漏洞，该漏洞源于对用户提供的文件名处理不当导致路径遍历，导致经过身份验证的用户可读取任意文件。

AI Predicted 8.6 Difficulty: Easy EPSS 0.32% · P23

Affected Version Matrix 1

VendorProduct Version RangeStatus
Altium Altium Enterprise Server < 8.1.1 affected
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I. Basic Information for CVE-2026-11423

Vulnerability Information
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Vulnerability Title
Path Traversal in Altium Enterprise Server Collaboration Service Allows Privilege Escalation
Source: CVE Program / CVE List V5
Vulnerability Description
A path traversal vulnerability exists in the Altium Enterprise Server Collaboration Service due to improper handling of user-supplied filenames in the MCAD and Simulation file download flows. A regular authenticated user can submit a collaboration message containing a crafted filename, which is later used to construct the download path on the server without validation, allowing arbitrary files to be read from the server filesystem. Because the readable files include the server's master configuration, which stores credentials for privileged accounts, exploitation can lead to authenticating as a system administrator and gaining full control of the server. Altium 365 cloud deployments are not affected.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Altium Enterprise Server 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Altium Enterprise Server是美国Altium公司的一款本地化数据管理服务器。 Altium Enterprise Server存在安全漏洞，该漏洞源于对用户提供的文件名处理不当导致路径遍历，导致经过身份验证的用户可读取任意文件。
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
Altium Altium Enterprise Server 0 ~ 8.1.1 -

II. Public POCs for CVE-2026-11423

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III. Intelligence Information for CVE-2026-11423

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Same Patch Batch · Altium · 2026-06-05 · 7 CVEs total

CVE-2026-11420 Path Traversal in Altium Enterprise Server NIS Allows Unauthenticated Arbitrary File Write
CVE-2026-11429 Path Traversal in Altium Vault ScriptsController Allows Unauthenticated Remote Code Execut
CVE-2026-11431 Path Traversal in Altium Projects Service Allows Arbitrary File Read
CVE-2026-11414 Unauthenticated File Exfiltration in Altium Enterprise Server Vault Service via Hard-coded
CVE-2026-11424 Server-Side Request Forgery in Altium Platform Design GraphQL Service Allows Information D
CVE-2026-11419 Path Traversal in Altium Enterprise Server Vault UploadController Allows Arbitrary File Wr

IV. Related Vulnerabilities

Same product: Altium Enterprise Server
Same vendor: Altium
Same weakness: CWE-22

V. Comments for CVE-2026-11423

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