CVE-2025-66271 Privilege escalation in Clone for Windows
A local attacker with write access to the system drive root can execute arbitrary code with SYSTEM privileges due to an unquoted service path.
- 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-2025-66271?
CVE-2025-66271 is a high-severity vulnerability in ELECOM CO.,LTD. Clone for Windows, published on 9 Dec 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Clone for Windows provided by ELECOM CO.,LTD. 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-2025-66271?
How do I fix CVE-2025-66271?
No fix has been published for CVE-2025-66271 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-66271 being exploited?
There is no known exploitation of CVE-2025-66271 in the wild and no public exploit code.
Sources
Also known as GHSA-qrgv-vwfh-8wq2.