Insecure SYSTEM Service Permissions in UPSilon2000V6.0 (RupsMon.exe) leading to trivial Local Privilege Escalation_CVE-2025-66266

{
    "lastseen": "",
    "description": "The RupsMon.exe service executable in UPSilon 2000 has insecure permissions, allowing the 'Everyone' group Full Control. A local attacker can replace the executable with a malicious binary to execute code with SYSTEM privileges or simply change the config path of the service to a command; starting and stopping the service to immediately achieve code execution and privilege escalation",
    "published": "2025-11-26T01:16:40.731Z",
    "modified": "2025-11-26T01:20:44.984Z",
    "type": "cve",
    "title": "Insecure SYSTEM Service Permissions in UPSilon2000V6.0 (RupsMon.exe) leading to trivial Local Privilege Escalation",
    "source": "Gridware",
    "references": "https://www.megatec.com.tw/software-download/",
    "id": "CVE-2025-66266",
    "bulletinFamily": "",
    "cwe": [
        "CWE-269"
    ],
    "cvelist": null,
    "sourceData": "MegaTec Taiwan UPSilon2000V6.0 6.0.5",
    "sourceHref": "",
    "cvss": {
        "score": 9.3,
        "severity": "CRITICAL",
        "vector": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N",
        "version": "4.0"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "UPSilon2000V6.0",
    "version": "6.0.5",
    "vendor": "MegaTec Taiwan",
    "ai_description": "Insecure permissions in RupsMon.exe service executable allowing local attackers to replace the executable with malicious binary for code execution and privilege escalation",
    "ai_severity": "Critical",
    "ai_vendor": "MegaTec Taiwan",
    "ai_product": "UPSilon2000V6.0",
    "ai_version": "6.0.5",
    "ai_score": 9.3
}