CVE-2025-66461 Privilege escalation in FULLBACK Manager Pro (for Windows)
A local attacker with write access to the installation directory can execute arbitrary code with SYSTEM privileges due to unquoted service paths.
- 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-2025-66461?
CVE-2025-66461 is a high-severity vulnerability in GS Yuasa International Ltd. FULLBACK Manager Pro (for Windows), published on 8 Dec 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
FULLBACK Manager Pro provided by GS Yuasa International Ltd. registers two Windows services with unquoted file paths. A user may execute arbitrary code with SYSTEM privilege if he/she has the write permission on the path to the directory where the affected product is installed.
Weakness: CWE-428
Which versions are affected by CVE-2025-66461?
How do I fix CVE-2025-66461?
No fix has been published for CVE-2025-66461 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-66461 being exploited?
There is no known exploitation of CVE-2025-66461 in the wild and no public exploit code.
Sources
Also known as GHSA-8jwj-hrwc-5589.