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

Quick assessment

Affected
MegaTec Taiwan ClientMate
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

MegaTec ClientMate是中国台湾鼎坚（MegaTec）公司的一个电源管理软件。 MegaTec ClientMate存在安全漏洞，该漏洞源于未加引号的服务路径，可能导致权限提升。

AI Predicted 7.8 Difficulty: Easy EPSS 0.12% · P2

Possible ATT&CK Techniques 1 AI

T1546.010 · AppInit DLLs
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I. Basic Information for CVE-2025-66264

Vulnerability Information
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Vulnerability Title
Unquoted Service path in UPSilon2000V6.0 SYSTEM privilege service
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
未经引用的搜索路径或元素
Source: CVE Program / CVE List V5
Vulnerability Title
MegaTec ClientMate 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
MegaTec ClientMate是中国台湾鼎坚（MegaTec）公司的一个电源管理软件。 MegaTec ClientMate存在安全漏洞，该漏洞源于未加引号的服务路径，可能导致权限提升。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
MegaTec Taiwan ClientMate 6.2.2 -

II. Public POCs for CVE-2025-66264

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III. Intelligence Information for CVE-2025-66264

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Same Patch Batch · MegaTec Taiwan · 2025-11-26 · 4 CVEs total

CVE-2025-66265 Insecure permissions in configuration directory (C:\\usr)
CVE-2025-66269 Unquoted Service Path in UPSilon2000V6.0(RupsMon and USBMate) running as SYSTEM
CVE-2025-66266 Insecure SYSTEM Service Permissions in UPSilon2000V6.0 (RupsMon.exe) leading to trivial Lo

IV. Related Vulnerabilities

Same product: ClientMate
Same vendor: MegaTec Taiwan
Same weakness: CWE-428

V. Comments for CVE-2025-66264

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