You have just purchased a dream home at the core of a city. Did you check the safety of your smart thermostat sensors? Also, verify whether your connected devices are opening a path to breach your network or privacy.  

With the ever‑expanding IoT landscape in 2025, is real security still possible, or are we chasing an illusion? 

As we step into 2025, the Internet of Things connects billions of devices, and so, too, does it expose us to more vulnerabilities than ever. From smart homes and wearables to industrial and medical IoT (IIoT and IoMT), the digital terrain is booming, but so is the risk. This post explores the most pressing IoT security challenges of today, backed by expert insights and real-world examples. 

The top IoT companies in India are contributing a significant role in addressing 2025’s evolving security challenges. They develop trustworthy, robust, and scalable solutions for various industries.  

Before opting for IoT solutions, you should have adequate knowledge regarding their safety and security challenges. This blog emphasizes whether these devices are secure and how do you implement them to assuage safety concerns.  

Why 2025 Is a Critical Year for IoT Security

• Explosive growth: According to data and resources, the number of IoT devices may exceed 27 billion by the end of 2025.   

• Surging cyberattacks: In 2025, about 33% of global cyberattacks involved at least one compromised IoT endpoint, up from 27% the previous year.  

• High‑impact breaches: Several case studies have revealed that compromised hospital pumps and traffic gridlocks in prime cities are responsible for threatening smart systems. 

To secure your IoT devices and utilize their growth, consult with the top IoT companies in India.  

Top IoT Security Threats in 2025

1. Weak or Default Authentication

Many devices still ship with factory credentials or lack multi‑factor authentication. Attackers can easily tap weak or reused passwords to enter your network.  

2. Unencrypted Data Transmission

Several IoT devices transfer data in simple text formats. These devices are more susceptible to man‑in‑the‑middle attacks or network interception. They are a great threat to your privacy if used in public or unstructured networks.  

3. Outdated Firmware & Patch Delays

Manufacturers may discontinue support, while devices deployed at scale often lag behind on updates. As a result, known vulnerabilities persist in the wild. 

4. Insecure Network Services and Open Ports

Unnecessary or misconfigured services, especially on consumer or industrial devices, create additional attack surfaces. When left enabled, these services often operate with default credentials or minimal oversight. 

5. Insufficient Access Controls

Poorly segmented networks and flawed permission models allow attackers or insiders to pivot from IoT endpoints into broader systems, whether enterprise OT networks or hospital infrastructure. Hire an IoT company that offers adequate access controls to your devices.  

6. Supply Chain and Hardware Risks

Unscrupulous people may try to meddle with firmware or hardware before devices reach the ultimate users. Complexity in components and third-party dependencies further complicates risk control. 

7. Emerging AI+Edge Threats

With intelligence moving to edge devices, attackers are starting to craft AI-driven exploits, ranging from adversarial data manipulation to automated penetration systems targeting real-time analytics  

8. Quantum-era Vulnerabilities

The rise of post‑quantum cryptography (PQC) presents challenges for memory-constrained IoT sensors and smart meters. Upgrading legacy systems to meet NIST’s PQC standards is increasingly urgent to mitigate future quantum threats.   

 The best IoT company in India knows how to deal with these challenges and offers trustworthy and scalable solutions to industries.  

Real‑World Consequences: Not Just Theoretical 

• Smart building hijack (NYC, April 2025): Attackers exploited HVAC instrumentation to gain access to internal servers, causing millions in business disruption. 

• Infusion pump breach (Germany, Feb 2025): A compromised smart medical device leaked thousands of patient records and disrupted surgeries.  

• Traffic system crisis (São Paulo, July 2025): Vulnerabilities in controllers caused coordinated gridlock and safety failures, linked to state‑sponsored exploitation.  

Mitigation Strategies: How Organizations Can Harden IoT Security

Strong Authentication & Device Identity

Enforce unique credentials per device, disable defaults, and enable MFA or certificate-based authentication for sensitive connectivity. To enhance IoT security, an organization should focus on onboarding and device‑identity management. They may even hire the best IoT company in India to secure device identity and authentication.  

 End-to-End Encryption with Modern Protocols

Use TLS 1.3 or higher for all transmissions. Employ forward secrecy and automatic certificate/key rotation to protect data in transit, even over public networks. 

Firmware Update Lifecycle Management

Automate patch deployment through secure update frameworks. Maintain a detailed device inventory and deploy updates across firmware versions in staged, audited rollouts. 

Network Segmentation & Service Hardening

Isolate IoT devices from critical networks using firewalls and micro‑segmentation. Disable unnecessary services and monitor for anomalous traffic on port endpoints. 

 Access Control Policies & Monitoring

Implement strict RBAC across users and services. An organization should rigorously monitor its remote and physical access and implement the principle-of-least-privilege across all major device interactions. 

Supply Chain Security and Hardware Trust

Vet vendors rigorously, validate software bill of materials (SBOMs), and audit manufacturing supply chains. Use secure boot, hardware root-of-trust modules, and code signing wherever possible. 

AI‑Aware Security Approaches

Leverage machine learning analytics to detect anomalous device behavior and automated threats. At the same time, establish governance for AI model integrity and adversarial resistance with the help of the best IT company in India. 

Prepare for Post‑Quantum Threats

Evaluate cryptographic readiness and plan upgrades for constrained devices. Adopt lightweight PQC algorithms and integrate compliance roadmaps aligned with NIST recommendations.  

A Security-Focused Regulatory Backdrop in 2025 

• U.S. “Cyber Trust Mark”: In early 2025, the FCC launched a voluntary certification marking products that meet baseline IoT security standards, creating consumer transparency and vendor incentives. 

• EU Cyber Resilience Act: Effective January 2025 (full enforcement by July 2027), this mandates mandatory security hygiene for IoT devices sold across the single market.  

Steps Taken by the Indian Government to Address IoT Security Challenges

India has strengthened its IoT security framework through both legislative reforms and technical regulation. The Telecom Engineering Centre (TEC) released the Code of Practice for Securing Consumer IoT Devices (TEC 31318:2021), enforcing security-by-design practices aligned with global standards like ETSI EN 303 645, mandating unique passwords, secure firmware updates, encryption, and secure provisioning.   

An IoT System Certification Scheme (IoTSCS) was launched under the Indian Telecom Security Assurance Requirements (ITSAR), requiring manufacturers to undergo testing and certification. 

On the governance side, CERT‑In and NCIIPC drive incident response, vulnerability coordination, and threat analysis supported by mandatory reporting rules under the IT Act and CERT‑In directions.  

Additionally, India’s Digital Personal Data Protection Act 2023 modernizes data‑handling obligations and imposes accountability for breaches, impacting IoT device makers and service providers under Section 43A and SPDI rules.  

The government is also working with the best IT companies in India and trying to deliver more scalable, firm, and trustworthy IoT solutions for various industries.  

Are We Safe Yet?

It is true that no system or device is impervious, and the same goes for IoT. By taking proactive security measures, companies can be significantly safer. Though the threats are thriving fast, there are tools and safety standards to mitigate the risks.  

Conclusion

Once a company understands the major risks of IoT and adopts the best practices, it can drastically reduce its exposure. 

Here, Grizon Tech comes forward to help you with the best IoT solutions. Our experts have adequate knowledge regarding IoT platforms and security-first design principles. By analyzing end-to-end risk, we secure a device’s lifecycle management, develop a compliance strategy, and offer next-generation cryptographic integration.  

Our core objective is to ensure that your IoT ecosystem thrives securely even in today’s vulnerable environment.  

For any kind of IoT solutions and services, contact us.