Top 8 Manufacturing Cybersecurity Risks That Require Real-Time Monitoring

Summary

• The manufacturing sector has become the second most targeted industry, experiencing a 300% increase in cyberattacks since 2019, with 69% of all ransomware attacks targeting manufacturing entities in 2024.
• The convergence of Information Technology (IT) and legacy Operational Technology (OT) systems has created an expanded attack surface where a single breach can halt production lines.
• To combat modern threats like supply chain attacks, ransomware, and IP theft, manufacturers must shift from periodic audits to a proactive strategy of real-time, continuous monitoring.
• Automate your proactive defense with a platform like Cyber Sierra's Continuous Control Monitoring, which provides real-time visibility across your entire IT and OT environment.

You've set up your smart factory with the latest IoT sensors. You've connected your production line to gather real-time data. But when you check your network traffic, you notice unusual connections to servers in countries where you have no operations. Is someone inside your network right now?

For today's manufacturers, this scenario is increasingly common. The manufacturing sector has become a prime target, experiencing a 300% increase in cyberattacks since 2019 and becoming the second most targeted industry for threat actors. Even more alarming, in 2024 alone, 1,171 manufacturing organizations experienced ransomware attacks, with 69% of all ransomware attacks specifically targeting manufacturing entities.

As one manufacturing IT specialist puts it, "The more devices on your network, the more attack vectors a hacker has." This reality is particularly concerning because, as another industry professional notes, "network protocols used in industry were not designed with security in mind."

The convergence of Information Technology (IT) and Operational Technology (OT) means a breach is no longer just a data issue—it can halt production lines, sabotage equipment, and cause physical consequences. To combat these evolving threats, manufacturers must abandon sporadic security audits and embrace a strategy of real-time, continuous monitoring across their entire digital ecosystem.

Let's examine the eight critical cybersecurity risks that make continuous monitoring essential for manufacturing operations today:

1. Vulnerable Supply Chains

The Problem: Modern manufacturers rely on a vast network of suppliers and third-party services. An attack on a single vendor can cascade through the entire supply chain, as we've seen in high-profile incidents like the Colonial Pipeline and JBS Foods attacks.

This pain point resonates deeply with manufacturing security professionals dealing with "mom and pop setups that cannot obtain certification" or smaller vendors with limited security resources. The traditional approach of annual vendor assessments leaves dangerous blind spots between evaluations.

Why Real-Time Monitoring is Essential: Point-in-time questionnaires are insufficient when threats evolve daily. Continuous monitoring of supplier connections and access points is required to detect threats originating from third parties before they infiltrate your network. Real-time visibility into vendor security posture allows you to make informed risk management decisions and take immediate action when vulnerabilities emerge.

2. Pervasive Ransomware Attacks

The Problem: Ransomware is uniquely devastating to manufacturers because production downtime can cost millions per hour, creating immense pressure to pay the ransom. These attacks encrypt critical files, disrupt production systems, and can bring operations to a complete standstill.

Why Real-Time Monitoring is Essential: Early detection is your best defense. Real-time threat monitoring can identify the initial signs of ransomware activity—such as unusual file encryption patterns, suspicious network traffic, or unauthorized system changes—allowing security teams to isolate affected systems before the malware can spread across the OT network. Continuous monitoring of backup integrity also ensures you can recover quickly without paying the ransom.

3. Expanded Attack Surface from Smart Factories (IoT/IIoT)

The Problem: Industry 4.0 technologies have introduced thousands of connected sensors, devices, and systems throughout manufacturing facilities. These IoT devices often lack built-in security controls, run outdated firmware, and create an exponentially larger attack surface.

As one manufacturer notes, it's a "poorly standardized area with plenty of different methods to access CNC machine controllers," making consistent security difficult to implement. Many IoT devices also lack proper authentication or encryption capabilities.

Why Real-Time Monitoring is Essential: You can't secure what you can't see. Real-time monitoring establishes complete OT asset visibility, discovering and continuously tracking all connected devices (PLCs, HMIs, SCADA servers, sensors). This allows security teams to detect anomalous behavior, unauthorized connections, and potential compromises across the expanded attack surface. Continuous monitoring also identifies misconfigurations and vulnerabilities in IoT deployments that periodic scanning might miss.

4. Unpatched and Outdated Legacy Systems (OT/ICS)

The Problem: This is perhaps the most significant challenge in manufacturing cybersecurity. As one industry expert bluntly states, "Manufacturing assets run for decades, so it's not uncommon to still see Windows 95... and the cost of upgrading can be huge." These legacy Industrial Control Systems (ICS) are often unpatched, unmonitored, and were never designed with internet connectivity in mind.

Notorious malware like Stuxnet and Triton have already demonstrated how vulnerable industrial control systems can be sabotaged with potentially catastrophic physical consequences. Yet, operational constraints often prevent regular patching or upgrades.

Why Real-Time Monitoring is Essential: Since patching legacy systems can be difficult or impossible without disrupting production, continuous monitoring becomes your primary defense. Proper network segmentation is a crucial first step, but it must be continuously monitored to ensure its integrity. Tools that provide Endpoint Detection and Response (EDR) for OT environments can monitor legacy systems for suspicious activity and isolate them if a threat is detected, even when patching isn't an option.

5. Intellectual Property (IP) Theft

The Problem: A manufacturer's most valuable asset is often its intellectual property—proprietary designs, formulas, manufacturing processes, and trade secrets. Cyberattacks targeting IP can occur quietly, with data being exfiltrated over long periods without detection, causing severe damage to a company's competitive edge.

IP theft is particularly concerning because it may not trigger obvious alarms like ransomware. Instead, attackers might maintain persistent access to slowly siphon valuable data.

Why Real-Time Monitoring is Essential: Real-time monitoring of data flows and user access patterns is crucial for detecting IP theft attempts. Advanced monitoring solutions can flag unusual access to sensitive data repositories, unexpected large data transfers to external locations, and suspicious user behavior that might indicate an IP theft operation in progress. This provides early warning of potential IP theft before significant damage occurs.

6. Insider Threats and Internal Breaches

The Problem: Not all threats come from outside your organization. Industry data shows that nearly 30% of cyberattacks are internal, originating from current or former employees with legitimate access. These individuals already have credentials and knowledge of internal systems, allowing them to bypass perimeter defenses.

As one security professional notes, "If someone has physical access, well then you are kinda screwed." Insiders can intentionally sabotage systems, steal data, or unintentionally create vulnerabilities through careless actions.

Why Real-Time Monitoring is Essential: Continuous monitoring of user behavior can detect deviations from normal activity patterns that might indicate malicious intent or a compromised account. This includes tracking access to sensitive systems, changes in privileges, unusual login times or locations, and atypical data access patterns. Real-time monitoring creates accountability and helps prevent insider threats from developing into serious breaches.

7. Phishing and Social Engineering

The Problem: Even with the best technical defenses, human error remains a primary vulnerability. Sophisticated phishing emails appearing to come from management or trusted vendors can trick employees into revealing credentials or deploying malware, providing attackers with an initial foothold in your network.

Phishing has evolved beyond obvious scams to highly targeted "spear-phishing" attacks crafted specifically for manufacturing environments, sometimes referencing real projects, vendors, or internal terminology.

Why Real-Time Monitoring is Essential: While security awareness training is the first line of defense, real-time monitoring of email gateways, network traffic, and endpoint activity is needed to detect and block phishing attempts that bypass preventive measures. Continuous monitoring can also identify the secondary actions an attacker takes after a successful phish, such as lateral movement or privilege escalation attempts, allowing for rapid response before significant damage occurs.

8. Growing Compliance and Regulatory Burdens

The Problem: Manufacturers face an increasingly complex web of regulations and standards, from ISO 27001 and NIST frameworks to industry-specific requirements and customer security mandates. Manually collecting evidence and proving compliance is time-consuming and prone to error, especially when audit-readiness is required year-round rather than just during assessment periods.

The challenge is compounded when manufacturers must ensure that their suppliers and partners also meet these standards—a task that becomes nearly impossible with traditional, manual assessment methods.

Why Real-Time Monitoring is Essential: Automated, continuous monitoring provides an ongoing audit trail and ensures that security controls are operating as intended at all times. This shifts compliance from a painful, periodic scramble to a continuous, automated process where evidence collection happens in real-time. When auditors request documentation, it's readily available rather than requiring emergency data gathering efforts.

Moving to a Proactive Defense with Real-Time Monitoring

The manufacturing landscape has fundamentally changed. The integration of IT and OT, coupled with a surge in sophisticated cyber threats, has made real-time cybersecurity monitoring a necessity, not a luxury. Here's how manufacturers can implement a more proactive defense against the eight risks outlined above:

For Supply Chain Risks:

Implement a robust Third-Party Risk Management (TPRM) program that goes beyond annual assessments. Move to continuous monitoring of your most critical suppliers and partners to identify security issues as they emerge.

Platforms like Cyber Sierra's TPRM module automate vendor assessments and provide continuous monitoring, helping you prioritize risks and ensure your partners meet your security standards. This reduces the manual effort of managing vendor questionnaires while providing much better visibility into your supply chain security posture.

For IoT, Legacy Systems, and Ransomware:

Deploy Continuous Control Monitoring (CCM) to gain real-time visibility into all assets and security controls across both IT and OT environments. This allows for the detection of anomalies and misconfigurations before they can be exploited.

A CCM solution, such as the one offered by Cyber Sierra, builds a central controls repository with near real-time updates. It automates control testing, detects exceptions, and provides actionable risk intelligence to proactively fix security gaps in your manufacturing environment.

For Insider Threats and Phishing:

Combine technical controls with a strong human firewall through regular, engaging security awareness training and simulated phishing campaigns. This educates employees on recognizing and reporting threats before they become breaches.

Building a security-conscious culture is critical. Training modules that specifically address manufacturing scenarios and risks help employees understand the real-world impacts of security failures in their environment.

For IP Theft and Compliance:

Streamline Governance, Risk, and Compliance (GRC) with an automated platform to manage multiple compliance frameworks (SOC 2, ISO 27001, etc.), collect evidence continuously, and generate audit-ready reports.

Modern GRC platforms automate data collection and risk assessments. Cyber Sierra's GRC module simplifies managing multiple frameworks and ensures ongoing compliance through continuous control monitoring, making enterprises audit-ready faster and reducing compliance fatigue.

Conclusion

The days when manufacturers could rely on air-gapped systems and perimeter security are gone. Today's interconnected manufacturing environments require a new approach to cybersecurity—one based on continuous visibility, real-time threat detection, and automated compliance.

As one industry expert noted during our research, proper "network segmentation, knowing protocols and ports, and protecting them is a good first step"—but it's only the beginning. Real-time monitoring takes this foundation and builds upon it, providing the ongoing vigilance needed to protect against evolving threats.

By implementing continuous monitoring across your manufacturing environment, you can detect threats earlier, respond faster, and prevent the costly downtime, data loss, and reputational damage that comes with successful cyberattacks. Most importantly, you'll gain the confidence that your critical operational technology is protected, even as you embrace the digital transformation that drives manufacturing innovation.

Frequently Asked Questions

What is the biggest cybersecurity risk for manufacturers?

While ransomware causes the most immediate financial and operational disruption, the convergence of IT and Operational Technology (OT) systems represents the most fundamental risk. Legacy OT systems, such as industrial controls and SCADA, were often designed without modern security in mind and are difficult to patch, making them highly vulnerable once connected to IT networks.

Why is continuous monitoring so important for manufacturing?

Continuous monitoring is crucial for manufacturing because threats evolve daily, and production environments are constantly changing. Unlike periodic audits that provide only a snapshot in time, continuous monitoring offers real-time visibility across both IT and OT networks, allowing security teams to detect and respond to anomalies, misconfigurations, and active threats as they happen.

How can manufacturers protect their legacy OT systems?

The most effective way to protect legacy OT systems that cannot be easily patched is through network segmentation and continuous monitoring. Segmentation isolates these vulnerable systems from the broader network, limiting potential attack paths. Continuous monitoring then watches for any suspicious activity or unauthorized connections within these isolated segments, providing a critical layer of defense.

What is the difference between IT and OT security?

IT security primarily focuses on protecting data (confidentiality, integrity, and availability). In contrast, OT security prioritizes the safety, availability, and reliability of physical processes. The consequences of an OT breach can include production shutdowns, equipment damage, and even physical harm to employees, making uptime and operational integrity the highest priorities.

How does a smart factory (Industry 4.0) increase cyber risk?

A smart factory increases cyber risk by dramatically expanding the attack surface. The introduction of thousands of interconnected Industrial IoT (IIoT) sensors and devices creates countless new entry points for attackers. Many of these devices lack robust security controls, run on unpatched firmware, and use insecure communication protocols, making them prime targets for compromise.

What is the first step to improve cybersecurity in a manufacturing plant?

The essential first step is to achieve complete asset visibility. This involves conducting a thorough inventory of all hardware and software assets across both IT and OT environments to understand what is connected to your network. You cannot effectively protect what you don't know you have, and this comprehensive inventory forms the foundation for risk assessment, network segmentation, and monitoring strategies.

The question is no longer whether you can afford to implement real-time monitoring—it's whether you can afford not to.