What is the CVSS score of CVE-2025-34047?

CVE-2025-34047 has a CVSS 4.0 base score of 8.7 (High). CVSS 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. EPSS exploitation probability: 1.1%.

How to fix or mitigate CVE-2025-34047?

Within 7 days: Identify all affected systems and apply vendor patches promptly. Monitor vendor channels for patch availability.

CVE-2025-34047

EUVD-2025-27845 HIGH

Improper Input Validation (CWE-20)

2025-06-26 disclosure@vulncheck.com

Path Traversal

8.7

CVSS 4.0 · NVD

Severity by source

NVD PRIMARY

8.7 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Lifecycle Timeline

EUVD ID Assigned

Mar 15, 2026 - 23:54 euvd

EUVD-2025-27845

Analysis Generated

Mar 15, 2026 - 23:54 vuln.today

CVE Published

Jun 26, 2025 - 16:15 nvd

HIGH 8.7

DescriptionCVE.org

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.

Analysis

Technical ContextAI

Path traversal allows an attacker to access files outside the intended directory by manipulating file paths with sequences like '../'. This vulnerability is classified as Improper Input Validation (CWE-20).