CVE-2025-34047 HIGH

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

Vendor Beijing Netguard Nebula Information Technology Co., Ltd.
Product Leadsec SSL VPN
Weakness CWE-22 · Path traversal
Published June 26, 2025
Last update December 23, 2025
View on NVD All CVEs

CVSS base score

8.7/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS 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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

June 26, 2025 CVE published
December 23, 2025 Record updated