Best Practices for Securing IoT Devices Against AI-Driven Threats

AI has made cyberattacks faster and easier to scale, but the most effective protection for internet-connected devices remains familiar: change default credentials, install security updates, isolate IoT networks, restrict access and monitor unusual activity. Microsoft’s 2025 Digital Defense Report says attackers are using generative AI to scale social engineering, discover vulnerabilities, automate lateral movement and adapt their tactics to evade security controls. That does not mean every IoT attack is AI-driven, but it does mean exposed devices can be found and abused more quickly.

For Bangladeshi homes, businesses and financial institutions, the risk extends beyond the device itself. A smart camera, industrial sensor or access-control system may depend on a mobile app, cloud platform, router and controller. NIST therefore treats consumer IoT security as a product-ecosystem issue rather than a device-only problem.

What AI Changes—and What It Does Not

AI can help attackers analyse information, generate convincing messages, identify weaknesses and coordinate activity at greater speed. It can also be used defensively to analyse logs, identify abnormal traffic, prioritise vulnerabilities and automate parts of incident response.

AI does not make basic security controls obsolete. An AI monitoring service cannot compensate for a factory password, unsupported firmware, an exposed management interface or an IoT device connected directly to a business-critical network. Preventive controls must come first; automated detection should provide an additional layer.

Quick Comparison

Security measure	What it protects	Main limitation
Unique passwords and MFA	Device accounts, apps and management portals	Does not automatically secure firmware, local services or network traffic
Firmware updates	Known software vulnerabilities	Unsupported devices may receive no patches; updates can require testing
Network segmentation	Limits lateral movement after compromise	Incorrect rules can disrupt device discovery or required cloud connections
Encryption and authentication	Protects data and commands in transit or storage	Encryption alone does not prevent unauthorised commands or replay attacks
AI-assisted monitoring	Unusual traffic, logins, data transfers and configuration changes	Can produce false positives and may be fooled by behaviour that appears normal

Key Features to Consider

1. Choose devices with a security lifecycle

Security should be part of the buying decision, not an afterthought. NIST recommends defining requirements before acquiring an IoT device, including its purpose, the data it collects, connectivity, safety impact, manufacturer support and integration with existing systems.

Look for a unique device identity, strong non-default authentication, secure configuration, signed or otherwise authenticated updates, protection for stored and transmitted data, security-event logging and a clearly documented support period. The manufacturer should also provide a vulnerability-reporting process and explain how security updates will be delivered.

A low-cost camera or sensor that cannot be updated may create more risk than its purchase price suggests. CISA describes end-of-support edge devices as particularly easy targets because they no longer receive security updates.

2. Replace factory credentials

Change every default password during setup. Use a different, strong password for each device and do not reuse credentials from email, banking, Wi-Fi or cloud accounts. CISA specifically identifies factory passwords as a major IoT weakness because default credentials are often publicly discoverable.

Enable multifactor authentication on the manufacturer’s app, cloud account and administrative portal whenever available. For organisations, phishing-resistant MFA should be used for administrative access where possible. Remove unused accounts, separate administrator and ordinary-user access, and restrict remote administration to approved users and networks.

3. Patch firmware promptly

Record the model, firmware version and patch status of every connected device. Subscribe to manufacturer security notifications and prioritise internet-facing devices and vulnerabilities known to be actively exploited.

Automatic updates are useful, but they are not a complete guarantee. Protection depends on the vendor continuing to issue updates, maintaining the update infrastructure and authenticating the firmware correctly. In factories, hospitals and other safety-sensitive environments, patches should be tested before deployment and accompanied by rollback or recovery procedures where feasible. Bangladesh Bank’s draft ICT security guideline also calls for patch categorisation, testing, documentation and exception handling.

Devices that cannot be patched should be isolated, have remote access disabled or be replaced—especially if they process sensitive information or control physical systems.

4. Separate IoT from trusted systems

Network segmentation prevents a compromised device from becoming an easy route to laptops, servers and databases. Home users can place smart bulbs, plugs, televisions, cameras and appliances on a separate guest or dedicated IoT Wi-Fi network. Work computers and phones used for banking should remain on a trusted network.

Check that the router’s guest network genuinely prevents access to trusted devices and does not expose router management. Disable device-to-device communication unless a product requires it. Businesses may need VLANs, firewalls, access-control lists or micro-segmentation to separate IT, IoT and operational-technology networks.

Bangladesh Bank’s draft guideline specifically requires organisations covered by it to segregate IoT networks from core networks, log connected devices and assess the access level each device should receive. The document is marked Draft and should not be treated as a universal final regulation, but its controls are directly relevant to financial organisations.

5. Disable unnecessary access and services

Turn off remote administration, unused ports, UPnP and wireless or cellular features that are not needed. Do not expose device-management interfaces directly to the public internet. Disable Telnet, FTP and other insecure services where supported; use encrypted management channels such as HTTPS, SSH or a VPN when remote access is necessary.

For cameras, microphones and location-aware products, review permissions and cloud settings. Convenience features can increase exposure if they allow unnecessary accounts, integrations or remote access.

6. Protect data and commands

IoT devices may handle video, audio, location, health, occupancy, access-control or industrial information. Use encrypted connections between devices, controllers and cloud services, and encrypt sensitive local storage where supported. Bangladesh Bank’s draft guidance calls for encryption of command-and-control communications, controller connections and sensitive local data.

Confidentiality is only part of the requirement. Communications, software changes and commands should also be authenticated so attackers cannot inject, replay or alter legitimate-looking instructions. Limit cloud-account permissions and check whether recordings or sensor data are retained or used for other purposes.

7. Keep an accurate inventory

Maintain a list of every device, including its manufacturer, model, unique identifier, owner, network location, firmware, purpose, data handled, support status and planned replacement date. CISA recommends tracking end-of-support dates as part of edge-device security.

An inventory helps identify internet-facing devices, obsolete equipment, cloud connections and systems capable of affecting physical processes. Unknown devices cannot be patched, segmented or investigated reliably.

8. Use monitoring without overtrusting AI

Many IoT devices cannot run conventional endpoint-security software. Network traffic, DNS requests, authentication events, configuration changes and firmware information therefore become important detection sources. CISA recommends centralised logging, traffic monitoring, configuration baselines and alerts for suspicious activity.

Warning signs include unexpected outbound connections, communication with unfamiliar domains or countries, sudden scanning of other devices, unusual data uploads, repeated login failures, unexpected reboots and unauthorised firmware or configuration changes.

AI-based monitoring can analyse large volumes of data and highlight subtle deviations from normal behaviour. It can also generate false positives, be affected by poor-quality inventories or be manipulated by attackers who imitate normal activity. Human review and deterministic access controls remain necessary, particularly when a response could unlock a door, stop machinery or affect safety.

Securing AI-Enabled IoT Features

Some cameras, voice assistants, predictive-maintenance systems and automation platforms use AI locally or through cloud services. These products create additional questions: where sensor data is sent, how long it is retained, who can access it and what actions the AI is allowed to perform.

Limit an AI system’s permissions and require confirmation for high-impact actions where practical. Log model inputs, outputs and resulting commands. Validate important sensor readings against independent signals, protect data integrity during storage and transmission, and review the system after firmware, model or cloud-service updates. AI should not receive unrestricted control over locks, alarms or industrial equipment.

Matter: A Useful Security Signal, Not a Guarantee

For smart-home buyers, Matter provides standardised security mechanisms. According to the Connectivity Standards Alliance, Matter devices use unique identities, encrypted communications and fine-grained access control. The standard also includes over-the-air updates, which can deliver security patches.

Matter 1.4.2 adds or strengthens vendor-ID verification, access restriction lists for network infrastructure devices and certificate-revocation mechanisms for potentially compromised device-attestation certificates.

Security still depends on the manufacturer’s implementation, mobile app, controller, cloud service and support lifecycle. Google’s Matter documentation also states that developers must sign OTA payloads and that devices must validate the signature before installing an update. Buyers should therefore treat Matter certification as a positive signal, not proof that the entire ecosystem is risk-free.

Practical Checklist for Home Users

Change every factory password and use unique credentials.
Enable MFA on device, cloud and smart-home accounts.
Install firmware, router and mobile-app updates.
Replace devices that no longer receive security updates.
Use a separate IoT or guest Wi-Fi network.
Disable remote access and unused services.
Review camera, microphone, location and cloud-storage permissions.
Remove old devices from apps and cloud accounts.
Disconnect devices that do not need internet access.
Reset devices securely before selling or discarding them.

What Organisations in Bangladesh Should Do

Businesses should include IoT devices in procurement, risk assessments and incident-response exercises. Require vendors to disclose support periods, update procedures, vulnerability-reporting channels, data-handling practices and integration requirements before purchase.

Financial institutions should pay particular attention to network segregation, strong authentication, encrypted controller communications, logging, patch testing and unique device credentials. Bangladesh has also established frameworks and guidance for critical information infrastructure, where operators are expected to assess and manage cyber risks; organisations should verify which current sectoral requirements apply to them rather than relying on a draft document alone.

Frequently Asked Questions

Does an AI security app make an IoT device safe?

No. It may identify unusual behaviour, but it does not replace passwords, MFA, firmware updates, segmentation, secure communications or least-privilege access.

Should an IoT device always be disconnected from the internet?

Disconnect it if cloud or remote features are unnecessary. If connectivity is required, restrict traffic, disable unused services and place the device on an isolated network.

Is guest Wi-Fi enough?

It is helpful but not automatically sufficient. Confirm that it blocks access to trusted devices and router-management interfaces. Higher-risk environments may require VLANs and firewall rules.

What should I do with an unsupported device?

Disable remote access, isolate it and check for a final vendor update or replacement. Replace it if it handles sensitive data or controls a safety-critical function.

Are Matter devices completely secure?

No. Matter provides identity, encryption, access control and update mechanisms, but the complete security outcome still depends on the product, app, controller, cloud service and manufacturer support.

Conclusion

AI-driven threats increase the speed and scale of attacks, but they do not change the core security priorities. Secure credentials, current firmware, isolated networks, restricted services, authenticated communications, complete inventories and dependable logging provide the strongest foundation.

AI-assisted monitoring can improve visibility and alert triage, but it should support—not replace—those controls. For Bangladeshi users and organisations, the practical rule is simple: buy devices with a support lifecycle, limit what they can reach, monitor what they do and remove devices that can no longer be secured.

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