CVE-2025-34047
CVE-2025-34047 is a high-severity vulnerability with a CVSS 4.0 base score of 8.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.
Key facts
- Severity: High (CVSS 4.0 base score 8.7)
- EPSS exploit prediction: 0% (37th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-27845
- Weakness: CWE-20
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2025-34047?
- 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.
- How severe is CVE-2025-34047?
- CVE-2025-34047 has a CVSS 4.0 base score of 8.7, rated high severity.
- Is CVE-2025-34047 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2025-34047?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2025-34047 have an EU (EUVD) identifier?
- Yes. CVE-2025-34047 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-27845.
- When was CVE-2025-34047 published?
- CVE-2025-34047 was published on 2025-06-26 and last updated on 2026-06-17.
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/
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