CVE-2025-66264 HIGH

CVE-2025-66264: Unquoted Service path in UPSilon2000V6.0 SYSTEM privilege service

Vendor Megatec Taiwan
Product ClientMate
Weakness CWE-428
Published November 26, 2025
Last update November 26, 2025

CVSS base score

7.2/10
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:L/SC:H/SI:H/SA:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

November 26, 2025 CVE published
November 26, 2025 Record updated