CVE-2025-34047

Leadsec VPN Path Traversal Arbitrary File Read

CVSS 8.7 HIGHEPSS 0.5%CWE-20 CWE-22

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 8.7EPSS 0.5%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

26 Jun 2025Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Affected products

Beijing NetGuard Nebula Information Technology Co., Ltd. · Leadsec SSL VPN

References

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