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CVE-2025-34047

Leadsec VPN Path Traversal Arbitrary File Read

Basic Information

CVE State
PUBLISHED
Reserved Date
April 15, 2025
Published Date
June 26, 2025
Last Updated
December 23, 2025
Vendor
Beijing NetGuard Nebula Information Technology Co., Ltd.
Product
Leadsec SSL VPN
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 Scores

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

SSVC Information

Exploitation
poc
Automatable
Yes
Technical Impact
partial

Exploit Status

Exploited in the Wild
Yes (2026-02-04 00:00:00 UTC) Source

References

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

Known Exploited Vulnerability Information

Source Added Date
The Shadowserver (via CIRCL) 2026-02-04 00:00:00 UTC

Timeline

  • CVE ID Reserved

  • CVE Published to Public

  • Added to KEVIntel