Businesses increasingly connect devices that sit somewhere between traditional IT equipment and specialised operational technology. Security cameras, environmental sensors, smart displays, access-control systems, meeting-room equipment, building-management components, tracking devices, and other connected products can all exchange information across business networks.
These devices often receive less security attention than laptops or servers because employees do not interact with them in the same way. However, they still contain software, credentials, network interfaces, management services, update mechanisms, and sometimes cloud connections. If one of those components is weak, the device can create an entry point or trusted position inside the environment.
An IoT security assessment examines those risks as part of VAPT. The purpose is not simply to determine whether someone can compromise the smart device itself, but to understand what that compromise could expose, control, or provide access to elsewhere in the business.
NIST’s IoT cybersecurity baseline identifies capabilities such as device identification, secure configuration, data protection, logical access control, secure software updates, and security-state awareness as important parts of IoT security.
Why IoT Security Assessment Should Be Part of VAPT
IoT security becomes a business issue when a connected device holds more trust than its purpose requires. A camera may need to send video to a recording platform, while an environmental sensor might communicate with a management server. Neither device normally needs broad access to finance systems, employee workstations, backup infrastructure, or administrative networks.
Problems arise when the network treats the device as simply another trusted internal system. Weak segmentation, default credentials, outdated firmware, unnecessary services, or exposed management interfaces can give an attacker a useful foothold that bypasses some of the controls protecting traditional endpoints.
Consider a hypothetical office building with dozens of network-connected cameras. The cameras sit on the same internal network as several business servers because the installers found that arrangement easiest during installation. One camera still uses an administrator password copied across the entire deployment, and its management interface contains an outdated software component.
Compromising the camera matters, but the larger concern is what happens afterwards. If the device can communicate directly with internal servers, it may provide an attacker with a persistent position inside a network segment that the organisation never intended users to reach through a security camera.
That is why IoT VAPT should consider both the device and the surrounding environment. The device may be the weakness, but network trust determines how much that weakness is worth.
What an IoT Security Assessment Should Test Across the Device Lifecycle
IoT VAPT needs a broader approach than simply running a vulnerability scanner against an IP address. The assessment may need to consider the device itself, its network interfaces, firmware, management application, credentials, update process, wireless connectivity, cloud services, and how the product behaves throughout its lifecycle.
1. Device Authentication and Default Credentials
Credentials remain one of the simplest ways to compromise poorly managed smart devices.
Some products ship with default administrator accounts, while others encourage installers to configure credentials during deployment. Problems can still appear when installers reuse the same password across hundreds of devices, weak credentials provide the only protection for administration, or sensitive interfaces lack stronger authentication options.
The NCSC warns that weak or default smart-device passwords can allow criminals to access devices and potentially use them as a route into the surrounding network. Its guidance also recommends enabling two-step verification where the product supports it.
Imagine a hotel deploying smart environmental controllers across 80 rooms. Each controller receives the same administrator password because technicians need a simple installation process. Compromise of one credential now provides potential access to every device using the same configuration.
An IoT security assessment can test whether each device uses unique and sufficiently strong authentication, whether appropriate controls protect it, and whether the organisation restricts administrative access to the people or systems that genuinely require it.
2. Firmware, Software Updates and Device Support
Connected devices can remain deployed for many years, which makes software support particularly important.
An organisation may replace a laptop every few years and manage it through established patching tools. By contrast, an organisation may continue using a smart camera, access controller, or building sensor until it physically fails, even after the manufacturer stops providing security updates.
NIST identifies secure software updating as a core IoT cybersecurity capability. Devices should support updates from authorised sources and use mechanisms that can verify the authenticity of those updates before installation. The NCSC similarly states that security patches are essential throughout a device’s supported lifespan and recommends replacing unsupported devices where possible.
Testing should therefore establish which firmware versions are running, whether known weaknesses affect them, how the manufacturer or management platform delivers updates, and whether an attacker can abuse the update mechanism itself.
3. Management Interfaces, Services and Device APIs
Smart devices often expose more functionality than users realise.
A web interface may control configuration, while mobile applications communicate with backend APIs. Devices can also expose SSH, Telnet, HTTP services, proprietary management protocols, discovery services, Bluetooth, or other local interfaces depending on the product.
Each interface creates another place where access controls and implementation weaknesses can fail.
For example, an office display system may provide a web management interface intended only for the facilities team. VAPT could reveal that the interface is accessible from the wider employee network and that a low-privilege account can change configuration settings reserved for administrators.
The immediate impact may appear small until the device is examined in context. If the same interface exposes network configuration, stored credentials, software upload functionality, or connections to another management platform, control of the display may provide more valuable opportunities.
Testing should therefore identify what services are available, which ones are necessary, who can reach them, and what privileges successful access provides.
4. Wireless and Network Connectivity
Many IoT products depend on Wi-Fi, Bluetooth, Ethernet, cellular connections, or combinations of several communication methods.
Wireless connectivity can create security paths that are easy to overlook during a traditional network assessment. A device may connect securely to the main infrastructure while exposing a secondary wireless setup interface or pairing mechanism that receives little attention after installation.
Network placement matters just as much.
IoT devices should not automatically receive the same network trust as employee endpoints or servers. A carefully designed environment can place smart devices into dedicated segments and permit only the connections required for their function.
A practical firewall and network configuration review can help determine whether those restrictions exist in practice. Testing might show that a camera network intended to communicate only with a recording server can also initiate connections towards administrative services elsewhere in the business.
The concern is not that the camera can reach the internet or another device. The question is whether the connectivity exceeds what its purpose requires and therefore increases the impact of compromise.
5. Data Protection and Cloud Dependencies
Smart devices can collect information that businesses would not normally associate with traditional IT systems.
Cameras capture video. Building sensors can reveal occupancy patterns, while connected access systems record entry events. Other devices may collect audio, location, environmental information, equipment status, or operational data.
Security assessment should determine how that information is stored, transmitted, authenticated, and protected from unauthorised access. Encryption, local storage, cloud APIs, mobile applications, and supplier-hosted management platforms may all form part of the data path.
NIST includes protection of stored and transmitted information among its core IoT security capabilities, alongside controls over logical access to interfaces.
Cloud dependency also introduces third-party considerations. If a smart device relies on a vendor platform for administration, alerts, firmware, or authentication, the organisation’s exposure does not end at the physical device installed on site.
How IoT Security Assessment Reveals Risk Beyond the Smart Device
The most useful IoT findings often concern what happens after the device is compromised rather than what the attacker can do to the device itself.
Consider a hypothetical logistics company using connected temperature sensors across a warehouse. The sensors send readings to a local management server before data is synchronised with a cloud dashboard. Employees rarely think about the sensors because they operate automatically.
During VAPT, testers identify an outdated management service on one sensor model. Controlled validation demonstrates that an attacker with access to the device network could alter its configuration.
Further testing shows that the sensor network can also communicate with the management server over several unnecessary services. That server, in turn, has connectivity towards the wider corporate environment because the system was installed before the company introduced stronger segmentation.
The finding is no longer simply “a temperature sensor has vulnerable firmware”. The real attack path is:
Vulnerable IoT device → management network → IoT server → wider corporate connectivity
This type of analysis is where IoT assessment becomes part of broader VAPT. An internal network VAPT assessment can determine whether compromise of a connected device or management system provides routes towards sensitive business assets.
Remediation may include updating or replacing vulnerable devices, restricting management interfaces, separating IoT networks, reducing the management server’s connectivity, changing credentials, and improving monitoring around unusual device behaviour. One vulnerability can therefore lead to several security improvements because the assessment exposes the architecture surrounding it.
Scoping IoT and Smart Device VAPT Without Missing Hidden Assets
Before IoT security testing begins, the organisation needs to know which connected devices actually exist.
This is often more difficult than expected. Facilities teams may purchase cameras or access systems, individual departments can install smart displays, warehouses may operate tracking technology, while suppliers can deploy monitoring equipment as part of a wider contract.
These assets do not always appear in the traditional IT inventory.
An asset discovery and attack surface management process can help reveal systems that have fallen outside normal visibility. For IoT environments, discovery should also include internal assets because many smart devices are not intentionally internet-facing but can still create risk inside trusted networks.
A useful scope should document more than an IP address. Information such as manufacturer, model, firmware version, physical location, purpose, network segment, owner, support status, management platform, connectivity method, and associated cloud service can substantially improve the assessment.
NIST’s final 2025 guidance on trusted IoT onboarding also emphasises verifying device identity and posture before providing network credentials, then managing devices securely throughout their lifecycle.
Lifecycle matters because IoT risk changes after deployment. A device that was secure when purchased can become unsupported, move to another network, inherit a new purpose, or remain active after the business believes it has been retired.
When Businesses Should Prioritise an IoT Security Assessment
IoT VAPT is particularly valuable when connected devices have access to sensitive networks, influence physical operations, process sensitive information, or exist in large numbers across the business. Testing also deserves priority when devices are difficult to patch, have been deployed for many years, or depend on management platforms that security teams have never assessed.
New deployments provide another strong trigger. Security weaknesses are easier to address before hundreds of devices are installed across offices, warehouses, stores, or other facilities. Testing a representative device and its supporting architecture before wider rollout can expose authentication, update, network, and management problems while changes are still practical.
Infrastructure changes should prompt reassessment as well. Moving an IoT platform to another network, connecting a building system to the corporate environment, replacing wireless infrastructure, or adding remote vendor access can alter the attack paths surrounding devices even when the hardware itself has not changed.
Organisations should also revisit IoT security when devices approach end of support. Continuing to operate equipment that no longer receives security updates can create accumulating exposure, especially when replacing the device requires significant cost or operational disruption.
The correct response is not always immediate replacement. Strong segmentation, access restrictions, monitoring, and other compensating controls may reduce risk while the organisation plans a migration, but those controls should be tested rather than assumed to work.
Final Thoughts
An IoT security assessment should look beyond whether a smart device can be compromised. The more important question is what that device can access, what information it handles, which management systems it trusts, whether it can be updated securely, and how much of the wider business becomes exposed if its security fails. Effective VAPT connects device weaknesses with network architecture, identity, data, lifecycle management, and realistic attack paths.
Aegixis VAPT Services can assess IoT and smart-device environments alongside the networks, management systems, interfaces, and supporting infrastructure they depend on. By testing devices in business context rather than treating them as isolated hardware, Aegixis can help organisations identify unnecessary trust, reduce hidden exposure, improve segmentation, and prevent a low-profile connected device from becoming a higher-impact security problem.
