CVE-2025-61871 Privilege escalation in NAS Navigator2 (Windows version only)
A local attacker with write access to the system drive root can execute arbitrary code with SYSTEM privileges due to an unquoted service path in BUFFALO NAS Navigator2.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-61871?
CVE-2025-61871 is a high-severity vulnerability in BUFFALO INC. NAS Navigator2 (Windows version only), published on 10 Oct 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-428
Which versions are affected by CVE-2025-61871?
How do I fix CVE-2025-61871?
No fix has been published for CVE-2025-61871 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-61871 being exploited?
There is no known exploitation of CVE-2025-61871 in the wild and no public exploit code.
Sources
Also known as GHSA-6348-w693-wj25.