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CVE-2025-34047— Leadsec VPN Path Traversal Arbitrary File Read

Quick assessment

Affected
Beijing NetGuard Nebula Information Technology Co., Ltd. Leadsec SSL VPN
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.

Leadsec SSL VPN是中国网御星云（Leadsec）公司的一款VPN。 Leadsec SSL VPN存在安全漏洞，该漏洞源于对文件/vpn/user/download/client中参数ostype的错误操作导致路径遍历攻击。

AI Predicted 9.8 Difficulty: Easy EPSS 0.48% · P40

Possible ATT&CK Techniques 1 AI

T1552.005 · Cloud Instance Metadata API
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I. Basic Information for CVE-2025-34047

Vulnerability Information
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Vulnerability Title
Leadsec VPN Path Traversal Arbitrary File Read
Source: CVE Program / CVE List V5
Vulnerability Description
A path traversal vulnerability exists in the Leadsec SSL VPN (formerly Lenovo NetGuard), allowing unauthenticated attackers to read arbitrary files on the underlying system via the ostype parameter in the /vpn/user/download/client endpoint. This flaw arises from insufficient input sanitation, enabling traversal sequences to escape the intended directory and access sensitive files. Exploitation evidence was observed by the Shadowserver Foundation on 2025-02-05 UTC.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
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
Leadsec SSL VPN 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Leadsec SSL VPN是中国网御星云（Leadsec）公司的一款VPN。 Leadsec SSL VPN存在安全漏洞，该漏洞源于对文件/vpn/user/download/client中参数ostype的错误操作导致路径遍历攻击。
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
Beijing NetGuard Nebula Information Technology Co., Ltd. Leadsec SSL VPN 0 -

II. Public POCs for CVE-2025-34047

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III. Intelligence Information for CVE-2025-34047

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IV. Related Vulnerabilities

Same weakness: CWE-22

V. Comments for CVE-2025-34047

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