CVE-2025-61871: BUFFALO NAS Navigator2 (Windows version only) · Unquoted Search Path or Element
Affects BUFFALO NAS Navigator2 (Windows version only)Source CVE Database V5
Not known to be exploited · CVSS 6.7 Medium : upgrade to 3.12.0 when convenient.
Data as of 26 Oct 2026, 08:30 UTC
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 3.12.0
CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 10 Oct 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade BUFFALO NAS Navigator2 (Windows version only) to 3.12.0.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| BUFFALO INC. NAS Navigator2 (Windows version only) | Affected
| Fixed in
|
AI-suggested
European organizations should immediately verify the version of NAS Navigator2 deployed on Windows systems and upgrade to version 3.12.0 or later where this vulnerability is fixed. If upgrading is not immediately feasible, organizations should restrict write permissions to the root directory of system drives to trusted administrators only, preventing unprivileged users from placing malicious executables. Implement application whitelisting and endpoint protection solutions that can detect or block unauthorized service path modifications or suspicious executables in system directories. Regularly audit service configurations for unquoted paths and correct them manually if necessary. Employ the principle of least privilege to limit user permissions on systems managing NAS devices. Additionally, monitor system logs for unusual service restarts or execution of unexpected binaries. Network segmentation can limit the impact of a compromised system. Finally, educate system administrators about this vulnerability and ensure timely patch management processes are in place.
Description
CVE-2025-61871 is a vulnerability in BUFFALO INC. 's NAS Navigator2 Windows client prior to version 3.12.0, caused by an unquoted service path. This flaw allows a user with write permissions on the root of the system drive to execute arbitrary code with SYSTEM privileges. The vulnerability arises because Windows interprets unquoted service paths containing spaces incorrectly, enabling path hijacking attacks. Exploitation requires local access with elevated privileges but no user interaction. The CVSS score is 6.7 (medium severity), reflecting significant impact on confidentiality, integrity, and availability if exploited. No known exploits are currently reported in the wild.