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Vulnerabilities

Vulnerability · CVE-2025-61871

NAS Navigator2 Windows version by BUFFALO INC.

Published Oct 10, 2025 · catalog updated Oct 10, 2025 · BUFFALO INC. NAS Navigator2 (Windows version only)

Last checked Nov 4, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-61871. EPSS is 0.17%. Act only if a listed version of BUFFALO INC. NAS Navigator2 (Windows version only) is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High8.4
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.17%
Remediation
Vendor / distro source
Affected products
vendor BUFFALO INC. NAS Navigator2 (Windows version only) prior to Ver.3.12.0

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor BUFFALO INC. NAS Navigator2 (Windows version only) prior to Ver.3.12.0prior to Ver.3.12.0

How to fix CVE-2025-61871

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-61871. EPSS is 0.17%. Act only if a listed version of BUFFALO INC. NAS Navigator2 (Windows version only) is installed.

Which versions are affected?

Compare what you have installed with BUFFALO INC. NAS Navigator2 (Windows version only) prior to Ver.3.12.0 prior to Ver.3.12.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.17%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Windows security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 10, 2025 · EUVD

    Detected

    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.

  2. Oct 10, 2025 · EUVD

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2025-61871

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-61871

    30-day exploitation probability 0.17%

    first.org
  • EUVDVulnerability recordEUVD-2025-33659

    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.

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 4, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 4, 2026
  • CVE.orgOct 23, 2026
  • EUVDOct 23, 2026