CVE-2025-34118
CVE-2025-34118 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: 1% (70th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-21752
- Weakness: CWE-20
- Published:
- Last modified:
Description
A path traversal vulnerability exists in Linknat VOS Manager versions prior to 2.1.9.07, including VOS2009 and early VOS3000 builds, that allows unauthenticated remote attackers to read arbitrary files on the server. The vulnerability is accessible via multiple localized subpaths such as '/eng/', '/chs/', or '/cht/', where the 'js/lang_en_us.js' or equivalent files are loaded. By injecting encoded traversal sequences such as '%c0%ae%c0%ae' into the request path, attackers can bypass input validation and disclose sensitive files.
Frequently asked questions
- What is CVE-2025-34118?
- A path traversal vulnerability exists in Linknat VOS Manager versions prior to 2.1.9.07, including VOS2009 and early VOS3000 builds, that allows unauthenticated remote attackers to read arbitrary files on the server. The vulnerability is accessible via multiple localized subpaths such as '/eng/', '/chs/', or '/cht/', where the 'js/lang_en_us.js' or equivalent files are loaded. By injecting encoded traversal sequences such as '%c0%ae%c0%ae' into the request path, attackers can bypass input validation and disclose sensitive files.
- How severe is CVE-2025-34118?
- CVE-2025-34118 has a CVSS 4.0 base score of 8.7, rated high severity.
- Is CVE-2025-34118 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2025-34118?
- 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-2025-34118 have an EU (EUVD) identifier?
- Yes. CVE-2025-34118 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-21752.
- When was CVE-2025-34118 published?
- CVE-2025-34118 was published on 2025-07-16 and last updated on 2026-06-17.
References
- http://www.linknat.com/
- https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/auxiliary/scanner/http/linknat_vos_traversal.rb
- https://web.archive.org/web/20151013001957/http://www.wooyun.org/bugs/wooyun-2010-0145458
- https://www.vulncheck.com/advisories/linknat-vos-manager-path-traversal-file-disclosure
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