Leadsec VPN Path Traversal Arbitrary File Read

Advisories

Leadsec VPN Path Traversal Arbitrary File Read

severity: high
date: 6/25/2025
Affecting: Leadsec SSL VPN
CVE: CVE-2025-34047
CVE type: CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CVSS: 8.7
CVSS V4 Vector: 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
References: Shadowserver Exploitation Evidence
GitHub Exploit
CNVD-2021-64035
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.
VulnCheck KEV: This advisory is in the VulnCheck KEV database

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