CVE-2025-34047

HIGH EPSS 36.7%
Published Jun 26, 20251y ago · Modified Jun 17, 20261w ago
8.7 CVSS 4.0
High
Find Similar
Published Jun 26, 2025 1y ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
8.7
Exploitability
—
Impact
—
Vector string
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
36.7% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 2

CWE-20 Improper Input Validation Validation
CWE-22 Path Traversal Resource Mgmt

References 4

  • github.com https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cnvd/2021/CNVD-2021-64035.yaml
  • vulncheck.com https://vulncheck.com/advisories/leadsec-vpn-path-traversal-file-read
  • cnvd.org.cn https://www.cnvd.org.cn/flaw/show/CNVD-2021-64035
  • leadsec.com.cn https://www.leadsec.com.cn/

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.