CVE-2025-34047CWE-20CWE-22

Leadsec VPN Path Traversal Arbitrary File Read

High · published June 26, 2025

CVSS v4.0
8.7
EPSS
1%
Percentile
45.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
8.7 · HIGH
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
EPSS
0.00548 · 45.1th percentile
Weaknesses
CWE-20 · Improper Input Validation; CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Published
2025-06-26T16:10Z
EPSS history
Timeline
  • 26 JUN 16:10Z
    Leadsec VPN Path Traversal Arbitrary File Read
    cvelistv5