CVE-2025-34118
Published: 16 July 2025
Summary
CVE-2025-34118 is a high-severity Improper Input Validation (CWE-20) vulnerability in Linknat VOS Manager (inferred from references). Its CVSS base score is 8.7 (High).
Operationally, ranked in the top 1.3% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
A path traversal vulnerability affects Linknat VOS Manager versions prior to 2.1.9.07, including VOS2009 and early VOS3000 builds. The flaw resides in the handling of localized resource paths such as /eng/, /chs/, or /cht/ when loading files like js/lang_en_us.js. Unauthenticated remote attackers can supply encoded traversal sequences such as %c0%ae%c0%ae to bypass input validation and retrieve arbitrary files from the server. The issue is tracked under CWE-20 and CWE-22 and carries a CVSS 4.0 score of 8.7 reflecting network-accessible, low-complexity file disclosure without authentication or user interaction.
Remote attackers require no credentials to exploit the vulnerability and can read sensitive configuration files, credentials, or other data stored on the affected server. Public exploit code, including a Metasploit auxiliary scanner module, demonstrates automated discovery and file retrieval across the localized subpaths.
The vendor has addressed the issue in VOS Manager 2.1.9.07 and later releases. Public references, including a VulnCheck advisory and archived reports, confirm that upgrading to a fixed version eliminates the traversal vectors.
The associated EPSS score stands at 0.7029 with no material rise after disclosure, while the presence of weaponized scanner modules indicates that exploitation tooling is already available to attackers.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-21752
Vulnerability details
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…
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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.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Directly implements checks on information inputs to reject invalid data before processing.
Security testing and developer training directly verify and enforce proper input validation, reducing exploitability of injection and malformed-data weaknesses.
Security testing and evaluation at multiple SDLC stages directly detects missing or flawed input validation, with the required remediation process ensuring fixes are applied.
Spam protection mechanisms perform filtering and detection on inbound/outbound messages, directly compensating for missing or weak input validation of unsolicited content.