CVE-2025-34047

Public Exploit
Leadsec VPN Path Traversal Arbitrary File Read

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.

Category

8.7
CVSS
Severity: High
CVSS 4.0 •
EPSS 0.14%
Third-Party Advisory org.cn Third-Party Advisory vulncheck.com
Affected: Beijing NetGuard Nebula Information Technology Co., Ltd. Leadsec SSL VPN
Published at:
Updated at:

References

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

Frequently Asked Questions

What is the severity of CVE-2025-34047?
CVE-2025-34047 has been scored as a high severity vulnerability.
How to fix CVE-2025-34047?
To fix CVE-2025-34047, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-34047 being actively exploited in the wild?
It is possible that CVE-2025-34047 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-34047?
CVE-2025-34047 affects Beijing NetGuard Nebula Information Technology Co., Ltd. Leadsec SSL VPN.
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