The following code is for security research and authorized testing only.
python
// Conceptual PoC for CVE-2026-32156 (Windows UPnP Device Host UAF)
// This demonstrates the logic of Use-After-Free
#include <windows.h>
#include <stdio.h>
void SimulateVulnerability() {
void* pVulnerableObject = NULL;
printf("[1] Allocating object in UPnP Device Host context...\n");
// Simulation: The service allocates memory
pVulnerableObject = HeapAlloc(GetProcessHeap(), 0, 1024);
printf("[2] Freeing the object (Vulnerability Trigger)...\n");
// Simulation: The service frees the memory but keeps the pointer
HeapFree(GetProcessHeap(), 0, pVulnerableObject);
// Pointer pVulnerableObject is now dangling!
printf("[3] Attacker reallocates memory (Heap Grooming)...\n");
// Simulation: Attacker takes over the freed memory block
void* pAttackerControlled = HeapAlloc(GetProcessHeap(), 0, 1024);
memset(pAttackerControlled, 0x90, 1024); // Fill with NOP/Shellcode
// Assuming pVulnerableObject points to pAttackerControlled now
printf("[4] Service attempts to use the freed pointer...\n");
// Simulation: The service tries to use the dangling pointer
memcpy((char*)pVulnerableObject + 512, "CRASH", 5);
printf("[+] Exploit triggered.\n");
}
int main() {
SimulateVulnerability();
return 0;
}