CVE-2026-21006 – Zigbee Light Link Factory Reset Exploit

Program Code (Python Zigbee simulation)

# zigbee_factory_reset.py - Simulated Zigbee coordinator sending factory reset command
import time

class ZigbeeDevice:
    def __init__(self):
        self.network_key = b'secret'
    def receive_command(self, cmd_id):
        if cmd_id == 0x00:  # Factory Reset
            print("Device factory reset! Network key cleared.")
            self.network_key = None

device = ZigbeeDevice()
# Attacker sends a specially crafted ZLL touchlink command (simulated)
print("Sending TouchLink factory reset command...")
device.receive_command(0x00)

CVE-2026-21006 – Zigbee Light Link Factory Reset Exploit

Overview

Zigbee Light Link (ZLL) devices support a factory reset via a TouchLink commissioning command that can be sent by any nearby ZLL controller. An attacker can force a device to reset, removing its network credentials and allowing take‑over.

Vulnerability Details

• Type: Unauthenticated Command Injection
• Impact: Device hijacking, network disruption.
• Root Cause: ZLL specification allows factory reset commands without authentication for proximity‑based convenience.

Exploit Demonstration

Run the simulation:

python zigbee_factory_reset.py

The device erases its network key upon receiving the command.