CVE-2025-66264 Unquoted Service path in UPSilon2000V6.0 SYSTEM privilege service
A local attacker can escalate privileges to SYSTEM by exploiting an unquoted service path in the ClientMate UPS monitoring software.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-66264?
CVE-2025-66264 is a high-severity vulnerability in MegaTec Taiwan ClientMate, published on 26 Nov 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
The CMService.exe service runs with SYSTEM privileges and contains an unquoted service path. This allows a local attacker with write privileges to the filesystem to insert a malicious executable in the path, leading to privilege escalation.
Weakness: CWE-428
Which versions are affected by CVE-2025-66264?
How do I fix CVE-2025-66264?
No fix has been published for CVE-2025-66264 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-66264 being exploited?
There is no known exploitation of CVE-2025-66264 in the wild and no public exploit code.
Sources
Also known as GHSA-hhgj-xcf6-9r3p.