IoT devices are transforming businesses but creating serious security risks.
With over 127 new devices connecting to the internet every second, IoT adoption is skyrocketing. However, these devices often have weak passwords, outdated software, and unencrypted data, making them easy targets for cyberattacks. In 2025 alone, IoT-based cyberattacks surged by 84%, with vulnerabilities exploited within 24 hours of discovery. Hackers use IoT devices to infiltrate networks, steal data, and disrupt operations, costing businesses millions in damages, downtime, and regulatory fines.
Key risks include:
- Default credentials: Easily exploited by brute-force attacks.
- Unpatched software: 21% of IoT devices have known vulnerabilities.
- Poor network segmentation: 77% of networks allow low-security devices to access critical systems.
To protect your business:
- Replace default passwords with strong, unique credentials.
- Regularly update device firmware and software.
- Segment networks to isolate IoT devices.
- Monitor device behavior and encrypt all data transmissions.
IoT security failures cost businesses up to $10 million per breach, but proactive measures can mitigate these risks and protect your operations.
IoT Security Threats: Key Statistics and Business Impact 2025
How IoT Devices Expand Business Attack Surfaces
What Are IoT Vulnerabilities?
IoT vulnerabilities refer to weak points in device hardware, software, or network protocols that attackers can exploit to infiltrate business networks. Many IoT devices come with default credentials, lack encryption for communications, and run on outdated firmware that often remains unpatched.
The risks associated with IoT vary across industries. For instance, in manufacturing, industrial sensors and robotics connected to IP networks are potential targets. Healthcare faces challenges with IoMT devices, with studies indicating that about 5% of medical devices are at risk. In retail, point-of-sale terminals and IP cameras often share networks with payment systems, creating additional vulnerabilities. Risk assessments reveal that the technology sector has an average risk score of 8.3, followed by education at 8.14 and manufacturing at 7.98. Across these industries, the presence of IoT vulnerabilities significantly increases the number of potential entry points for attackers, escalating overall security concerns.
Device Proliferation and Unsecured Endpoints
The sheer number of connected devices in enterprise environments further complicates security. On average, enterprise networks host around 35,000 connected devices spanning 80 different types, with approximately 32.5% of these devices operating outside IT oversight. This lack of control creates critical blind spots. Compounding the issue is the rise of "shadow IoT" – consumer devices such as smart TVs and set-top boxes now make up nearly 50% of IoT devices in corporate settings. Some networks have even reported 323% more devices than expected.
"Attackers are exploiting the gap between knowing a device exists and understanding the actual risk it creates." – Asher Davila and Xu Zou, Palo Alto Networks
Another major concern is poor network segmentation. Roughly 77.74% of networks lack proper segmentation, allowing low-security devices to share the same subnet as high-value assets. This poor setup means about 48.2% of connections from IoT devices to company IT systems come from high-risk devices. These gaps in oversight magnify the risks posed by already vulnerable IoT devices.
Examples of IoT Security Breaches
Several incidents highlight the dangers of IoT vulnerabilities. In April 2019, hackers exploited an unauthorized Raspberry Pi connected to NASA‘s Jet Propulsion Laboratory network, stealing approximately 500 MB of data related to Mars missions. Another notable example is the October 2016 Mirai botnet attack, where attackers used devices with default credentials – such as compromised DVRs and IP cameras – to launch a massive DDoS attack on DNS provider Dyn. This resulted in widespread outages for platforms like Twitter, GitHub, and Netflix.
More recently, in October 2025, researchers discovered that nearly 49% of Axis IP cameras in a study of 25,000 were running firmware set to reach end-of-support by December 31, 2025, leaving them vulnerable to future attacks. Routers are particularly concerning, accounting for 75% of IoT infections, while security and IP cameras make up 15%. These examples demonstrate the tangible risks IoT vulnerabilities pose to business security, with real-world consequences that can disrupt operations and compromise sensitive data.
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Common IoT Vulnerabilities and Their Business Impacts
IoT vulnerabilities don’t just reveal technical weaknesses – they also lead to serious business consequences.
Default Credentials and Weak Authentication
Default credentials might simplify setup, but they leave devices wide open to attackers. Automated brute-force or dictionary attacks can exploit these gaps, giving hackers admin-level access in no time. For example, during one study, enterprise networks faced a staggering 3.48 billion brute-force password attempts. Once attackers break in, weak authentication systems make it easy for them to escalate privileges and move laterally through networks. Without safeguards like multi-factor authentication or tight access controls, even something as mundane as a smart thermostat or a security camera can become a backdoor to vital corporate servers. Shockingly, 15% of routers still rely on weak factory default passwords, making them easy prey for attackers. Add outdated software to the mix, and the risks multiply.
Outdated Firmware and Software
Many IoT devices lack automatic updates, leaving them vulnerable to known exploits for years. The numbers are alarming: 34 of the 39 most-used IoT exploits have existed in devices for over three years, and roughly 21% of IoT devices come with at least one known vulnerability.
"In the race to connect everything, IoT devices often cross the finish line with vulnerabilities in tow, thanks to designs that prioritize speed over security." – Palo Alto Networks & Starfleet Research, The 2024 Benchmark Report on IoT Security
This lack of updates not only compromises security but also undermines system reliability. Many organizations delay addressing these vulnerabilities, prioritizing quick deployment over long-term protection. This short-sighted approach leaves networks exposed to repeated malware attacks and operational disruptions that can last for weeks or even months.
Unencrypted Data Transmission
A staggering 98% of IoT device traffic travels unencrypted, sent in plain text for anyone to intercept. This opens the door to Man-in-the-Middle attacks, where hackers can steal sensitive data or credentials. Shockingly, fewer than half of businesses encrypt all IoT data transmitted over public networks. IoT devices face an average of 5,000 attacks per month, and many are targeted within just five minutes of being connected to the Internet. This lack of encryption not only heightens security risks but also exposes companies to hefty fines under regulations like GDPR and CCPA, which penalize breaches involving unprotected data.
Financial and Operational Costs of IoT Exploits
IoT security failures hit businesses hard, both financially and operationally. As highlighted earlier, IoT vulnerabilities not only widen the scope for attacks but also lead to serious consequences for business stability. This section dives into how these vulnerabilities translate into real-world costs.
Breach Costs and Downtime
The financial toll of IoT breaches is staggering. By 2025, the average cost of a single IoT device breach is projected to be $330,000, while incidents in industrial settings could average $5.56 million. For IoMT (Internet of Medical Things) environments, that figure climbs to $10 million per breach. Globally, the average cost of a data breach has already reached $4.4 million.
Operational technology (OT) breaches, unlike IT breaches, often result in immediate shutdowns. These incidents require manual failovers and lead to significant productivity losses. Mohammed Khalil, Cybersecurity Architect at DeepStrike, explains:
"The cost of an OT breach, however, is kinetic… successful attacks on manufacturing sites and water utilities lead to immediate and complete operational shutdowns".
For manufacturers, the stakes are especially high – outages cost an average of $2.25 million per incident. Moreover, 34% of IoT-related breaches result in cumulative costs ranging from $5 million to $10 million.
Organizations with inadequate IoT security face even steeper losses. Over two years, such businesses report average losses of $34 million, with 59% citing significant financial damage and productivity setbacks. On top of that, 70% of organizations report major business disruptions after a breach.
Regulatory and Compliance Penalties
Beyond the direct costs of breaches, regulatory penalties add another layer of financial risk. For instance, the UK’s Product Security and Telecommunications Infrastructure (PSTI) Act imposes fines of up to £10 million or 4% of global revenue – whichever is greater – for failing to meet IoT security standards. These rules specifically target issues like default passwords and other "insecurity by design" flaws.
Companies with poor IoT security practices often face legal and compliance penalties, with 43% reporting such consequences. Insurance providers are also tightening their policies, charging higher premiums, capping payouts, or outright denying coverage to businesses that fail to meet stringent security requirements. Alarmingly, 52% of security budgets are spent on addressing breach-related costs instead of funding preventive measures.
Damage to Reputation and Customer Trust
The fallout from IoT breaches isn’t just financial – it’s reputational. On average, lost business costs – including customer churn, reputation damage, and downtime – amount to $2.8 million per breach. When customers perceive a company as insecure, they often switch to competitors with stronger security measures, making it harder to retain clients.
Rebuilding trust after a breach is both time-consuming and expensive. Companies often pour resources into marketing and public relations efforts during a time when budgets are already stretched thin. Some businesses try to offset losses by increasing prices, with 63% admitting to raising costs after a breach. However, this can alienate price-sensitive customers, further straining loyalty.
The long-term effects can be even more damaging. IoT breaches often lead to intellectual property theft, eroding a company’s competitive edge and stalling growth. The message from regulators, insurers, and customers is clear: failing to secure IoT devices has consequences that extend far beyond the initial breach.
Solutions for Addressing IoT Security Vulnerabilities
The financial and reputational risks tied to IoT breaches highlight one undeniable fact: businesses must prioritize securing their devices. The good news? There are tried-and-true methods to safeguard IoT environments and minimize vulnerabilities often exploited by attackers.
Implementing Strong Authentication Measures
One of the first steps to securing IoT devices is replacing default credentials as soon as they’re deployed. Factory-set passwords should be swapped with unique, complex ones immediately when connecting devices to the network.
For enterprise-level security, digital certificate-based authentication (PKI) using X.509 certificates ensures robust, mutual identity verification.
"IoT device authentication serves as the digital gatekeeper that verifies the identity of every connected device before granting network access".
Hardware-based authentication using TPMs or HSMs embeds credentials securely, making them resistant to software attacks. For devices with limited resources, methods like OAuth 2.0 or JSON Web Tokens work well.
Incorporating multi-factor authentication (MFA) adds another layer of protection by requiring multiple verification methods – such as keys, certificates, or hardware identifiers. Adopting a Zero Trust Architecture further strengthens defenses by mandating continuous authentication and granting devices only the minimum permissions necessary for their tasks. ESI Technologies offers access control solutions that integrate biometric and keycard systems with these advanced frameworks, providing businesses with layered and adaptable security options.
Regular Updates and Patch Management
Strong authentication is just the beginning. Regular updates are equally critical to address known vulnerabilities. Many IoT attacks exploit weaknesses that could have been avoided with timely patching.
"IoT devices don’t fail because attackers are smart. They fail because most deployments are careless".
Start with a detailed inventory of devices, including a Software Bill of Materials (SBOM). This helps businesses quickly identify which devices are vulnerable to newly discovered risks. Open-source and third-party software often introduce vulnerabilities, making this step essential.
Automated staged roll-outs make update deployment safer. Tools like canary deployments allow businesses to test updates on a small scale before rolling them out widely. Roll-back mechanisms are also crucial, enabling devices to revert to a stable version if an update causes issues. Testing patches in a controlled environment before deploying them in live systems minimizes disruptions.
Securing the update process itself is vital. All Over-the-Air (OTA) updates should be encrypted and verified using signed firmware and Secure Boot processes to prevent attackers from injecting malicious code. For legacy devices that can’t be updated, measures like network isolation or "virtual patching" through intrusion prevention systems can block exploits at the network level.
Network Segmentation and Device Monitoring
Strengthening individual devices is important, but securing the network they operate on is just as critical. Network segmentation ensures that a single compromised device doesn’t jeopardize the entire system. By dividing networks into smaller sections using Virtual Local Area Networks (VLANs) and Access Control Lists (ACLs), businesses can limit IoT traffic to only essential destinations.
"In an unsegmented network… there is a greater chance that a single compromise event will spread laterally to become a contagion".
This is especially useful for isolating older devices that lack modern security features. Adding firewall proxies with deep packet inspection and SSL/TLS decryption further secures inter-segment traffic.
"The notion of ‘You are only as strong as your weakest link’ took on a new meaning when IoT and OT devices and capabilities were introduced".
Monitoring device behavior is equally important. Establish baselines for normal activity to quickly spot anomalies. Since traditional endpoint security tools often don’t work on IoT hardware, businesses should adopt solutions that continuously analyze device behavior in real-time. Integrating IoT logs and telemetry into Security Incident and Event Management (SIEM) systems provides better visibility across the network. ESI Technologies offers 24/7 monitoring services, delivering real-time alerts and analytics to detect unusual activity before it escalates into a full-blown breach.
Building an IoT Security Framework
While individual security measures are important, a well-rounded framework that integrates policies, governance, and management tools across the organization is crucial for effective IoT protection.
Centralized IoT Device Management
A solid IoT security framework begins with understanding your assets. Maintaining an asset inventory that includes details like manufacturer, model, and version is key. After all, you can’t secure devices you don’t know exist.
Zero-touch provisioning simplifies onboarding by assigning devices unique identities and cryptographic keys automatically, reducing manual errors and ensuring secure credentials from the start. Additionally, having a Software Bill of Materials (SBOM) for every device allows quick identification of vulnerabilities tied to specific software components or libraries.
Centralized platforms streamline patch management, enabling secure and timely updates across large device networks. Automated solutions not only improve efficiency but can also save up to 70 times the cost of manual approaches when securing enterprise IoT devices.
With centralized management in place, fostering a unified approach to security across teams becomes the next critical step.
Cross-Functional Security Awareness
Technology alone isn’t enough – building a security-conscious culture is just as important. Effective IoT security depends on collaboration between hardware manufacturers, software developers, operations teams, and business leaders. Each group brings unique insights into device usage, data flow, and system integration.
"Managing the complex IoT lifecycle is a new challenge for organizations that requires a revolutionary approach." – Palo Alto Networks
Operational teams must understand the risks associated with connecting new devices, while IT teams need to see how these devices fit into business workflows. Meanwhile, leadership should define Service Level Indicators (SLIs) and Service Level Objectives (SLOs) that tie security performance to business goals. Regular training sessions and cross-functional meetings can help create a shared understanding of each team’s role in securing IoT systems.
Aligning IoT Security with Business Goals
The best IoT security frameworks are designed to support broader business objectives, not operate in isolation. Start by conducting formal risk assessments using tools like MITRE ATT&CK for ICS. This helps prioritize security investments based on their impact on business operations. Devices can then be categorized by factors such as safety criticality, business importance, and ease of patching, ensuring technical decisions align with operational needs.
Business continuity planning should specifically address IoT and Industry 4.0 systems, with regular testing to confirm resilience during disruptions. Additionally, understanding how IoT data management and device controls affect compliance requirements can help businesses avoid penalties while maintaining security standards. When security measures align directly with business goals – whether it’s minimizing downtime, ensuring compliance, or safeguarding customer data – they are more likely to receive the attention and resources they need.
ESI Technologies’ managed security services provide centralized monitoring and real-time analytics to support these frameworks. This ensures businesses maintain visibility across their IoT infrastructure while aligning security efforts with operational priorities, ultimately strengthening their resilience against IoT-related risks.
Conclusion: Protecting Your Business from IoT Risks
Securing your IoT environment is no longer optional – it’s a necessity. With IoT devices making up 30% of enterprise networks and attacks increasing by an alarming 124% in 2024, the risks are clear. The good news? Most vulnerabilities can be addressed with a well-thought-out security strategy.
The financial stakes are high, with breaches costing businesses anywhere between $5 million and $10 million. Beyond financial losses, there’s the added burden of downtime, regulatory penalties, and damage to your reputation. As Joeri Barbier, Chief Information Security Officer at Getronics, wisely states:
"The time to fortify your systems is today, not after the first breach".
By following proven security measures like network segmentation, strong authentication, regular patching, continuous monitoring, and centralized management, you can safeguard your IoT ecosystem while ensuring it supports your business goals. Considering that 65% of organizations rely on IoT devices for daily operations, protecting these devices is crucial for uninterrupted business functionality.
Start with the basics: change default credentials, maintain an up-to-date inventory of connected devices, and isolate IoT systems from critical networks. From there, step up to automated patch management and real-time monitoring. These steps require constant attention as your IoT environment grows and evolves.
Companies like ESI Technologies offer 24/7 monitoring and real-time alerts to help businesses stay ahead of emerging threats. With the right tools and a solid security framework, you can confidently leverage IoT technology while minimizing risks to your operations.
FAQs
How do I find every IoT device on my network?
To identify all IoT devices on your network, try using network discovery tools. These tools scan your network for connected devices by analyzing IP addresses and device signatures. Popular network scanners can help you pinpoint what’s connected and where. Make it a habit to run these scans regularly and update your inventory. This practice helps you spot unmanaged IoT devices, tackle potential vulnerabilities, and strengthen your network’s security.
Which IoT devices should I secure first?
To protect your business, focus on securing devices that are always-on, heavily connected, or essential to your operations. This includes network equipment, IP cameras, VoIP devices, hypervisors, and unmanaged devices. These devices are often more vulnerable and exposed to potential attacks, making them a prime target for cyber threats. Safeguarding them should be a top priority in your security strategy.
What should I do with IoT devices that can’t be patched?
If an IoT device can’t be updated with patches, replacing it as soon as possible is essential. Unsupported devices leave your network exposed to potential attacks. While you’re arranging a replacement, you can reduce risks by using network segmentation or implementing temporary safeguards. Still, swapping out outdated devices for secure, supported options remains the best way to ensure long-term protection for your business.