Cybersecurity for Manufacturing Companies: The Risks Most IT Teams Underestimate
Learn why manufacturers are the most targeted sector and what security programs built for industrial environments actually need.
For five consecutive years, manufacturing has been the most targeted industry for cyberattacks globally. This consistency is not coincidental. Rather, it is a symptom of the structural vulnerabilities that most manufacturing IT teams inherit.
Factors like legacy operational technology that’s connected to modern networks, intellectual property that competitors and nation-state actors find valuable, and a production environment where downtime carries an immediate, measurable financial cost create built-in negotiating pressure for ransomware operators.
The threat to manufacturers and their IT teams is accelerating. In most cases, the biggest challenge they face is determining where the specific gaps are within their industrial environment. This necessitates an understanding of why standard IT security frameworks (that are designed for office environments) underperform when applied without modification to a factory floor.
Why Manufacturing Is a Disproportionate Target
The combination of factors that makes manufacturing attractive to attackers is worth understanding specifically, because it shapes what an effective security program needs to address.
Production downtime creates immediate leverage
When a ransomware attack hits a manufacturer’s IT systems, it doesn’t need to touch the operational technology on the factory floor to stop production. Disrupting the IT systems that support industrial environments alone is enough to halt operations. These include ERP systems, production scheduling softwares, and quality control platforms.
Every hour of downtime carries a cost that’s measured by delayed shipments, idle workforces, and missed contracts. Ransomware operators know this, and they price their demands accordingly. According to the IBM 2026 X-Force Threat Intelligence Index, manufacturing has been the most targeted industry for the fifth consecutive year, accounting for 27.7% of all incidents observed globally, with data theft now being the most common outcome. This reflects a shift toward extortion-based attacks that compound the financial damage beyond the initial disruption.
Intellectual property has long-term value beyond ransom
Unlike credential data, which has a short shelf life, manufacturing intellectual property, such as product designs, process formulas, supplier contracts, and quality specifications, retains value long after a breach is disclosed.
Data theft now accompanies or replaces encryption in many manufacturing attacks, creating a risk profile that extends beyond operational disruption to long-term competitive damage. A single incident can carry both immediate financial consequences and lasting competitive harm, marking a different type of exposure than most IT-only breaches.
OT/IT convergence has expanded the attack surface faster than security has kept up
Industry 4.0 has connected industrial control systems, sensors, robotics, and operational technology to corporate IT networks and cloud platforms. The efficiency gains are real, but so is the exposure.
Legacy Operational Technology (OT) systems were designed for reliability and longevity, not security. Many run operating systems that no longer receive patches, cannot support endpoint security agents, and were never designed to be connected to the internet.
This means that when OT and IT share network segments without proper segmentation, an attacker who gains initial access through a phishing email or compromised vendor credential can traverse from corporate systems to production infrastructure without crossing a meaningful security boundary.
Supply chain access creates systemic risk
Manufacturing depends on an extended network of suppliers, logistics partners, and technology vendors, many of whom have some form of access to the manufacturer’s systems or data. A third-party vendor with legitimate access to an OT environment, or a single employee credential that’s been compromised through a phishing email can give attackers a foothold that bypasses perimeter controls entirely.
The IBM X-Force data confirms that large supply chain and third-party compromises have increased nearly fourfold over the past five years across all sectors. This trend is particularly acute in the manufacturing sector, which is typically marked by an extended vendor ecosystem.
In AISN’s assessments of industrial and manufacturing environments, it is very common to observe the following gaps: vendor remote‑access pathways that were added years ago and never revisited, OT systems communicating over flat network segments that are shared with corporate IT, and legacy controllers running outdated firmware that cannot be patched without halting production.
These systemic gaps across the entire sector reflect the operational realities of environments where uptime has historically taken precedence over security.
The Security Gaps Most Manufacturing IT Teams Underestimate
The most common cybersecurity failures in manufacturing environments are not the result of insufficient investment. They are the result of applying frameworks that were built for general IT environments to contexts they were not designed to address.
Flat networks with no segmentation between IT and OT
Many manufacturing environments run flat or minimally segmented networks where corporate systems and production systems share the same network without meaningful boundaries. This configuration allows attackers who compromise an endpoint on the corporate network to move laterally toward production systems without encountering additional controls.
Network segmentation that creates defensible boundaries between IT and OT environments is among the highest-impact controls available to manufacturing organizations. It is also among the most consistently absent, however.
Unpatched and unsupported OT systems
Operational technology systems are designed for decades of use. Many manufacturing environments run industrial control systems and SCADA platforms on operating systems that are no longer supported by their vendors because replacing or upgrading them requires production downtime and revalidation of manufacturing processes.
The result is a large, installed base of systems with known, exploitable vulnerabilities that cannot be patched on a standard IT security cycle. This makes regular vulnerability assessments a critical compensating control for environments where patching is operationally constrained.
The SANS Institute’s 2025 State of ICS/OT Security Report found that more than one in five organizations globally reported a cybersecurity incident that affected OT systems in the past year, with 40% of those incidents causing operational disruption. Nearly 20% of those took more than a month to remediate.
Remote access without sufficient controls
The expansion of remote monitoring, vendor access, and remote maintenance in manufacturing environments has created access pathways that often lack the controls that are applied to corporate remote access.
VPN configurations that were adequate for occasional use by IT staff become significant exposures when extended to dozens of vendors with varying security practices. Multi-factor authentication misconfiguration consistently ranks among the costliest weaknesses in manufacturing incidents. This should make MFA enforcement across all remote access pathways a priority control, regardless of other investments.
Incident response plans built for IT, not OT
Most manufacturing organizations have incident response plans that were written for IT environments, making them incompatible to the organization’s actual needs.
A ransomware incident that affects a corporate email system has a different response sequence than one that affects a production line. The containment decisions, the recovery priorities, the communication protocols, and the tolerance for taking systems offline all differ in an OT context.
Understanding why every organization needs an incident response plan is the starting point. Adapting it to an OT environment is the next step, and where most manufacturing programs fall short. An IR plan that has not been tested against manufacturing-specific scenarios that include production disruption, supply chain notification, and recovery sequencing between IT and OT systems will routinely underperform.
Vendor and third-party access without oversight
Vendors with remote access to industrial systems (for maintenance, monitoring, or support) represent access pathways that are often managed less rigorously than employee access. The same third-party risk dynamic that creates exposure in IT environments is amplified in OT contexts, where vendor access may extend directly to production systems. Periodic access reviews, just-in-time access controls, and monitoring of vendor sessions are controls that most manufacturing environments have not systematically implemented.
Across our work, we regularly see a predictable set of gaps that general IT security programs fail to catch. These include shared operator credentials on production workstations, remote‑access tools deployed by equipment vendors without MFA or logging, and OT devices that have never been included in a formal asset inventory. These issues are not signs of negligence, they are instead the natural result of environments where production continuity has taken precedence. Unfortunately, they create conditions where a single compromised credential or vendor session can provide attackers with direct access to critical systems.
What a Security Program for Manufacturing Actually Needs
Effective cybersecurity for manufacturing requires adapting general security frameworks to the specific constraints of an industrial environment. It is not about replacing one with the other, but building a program that addresses both.
OT-aware asset inventory
You cannot protect what you cannot see. Manufacturing environments often lack a current, accurate inventory of OT assets like industrial controllers, sensors, HMIs, and other devices that communicate on the network, but may not appear in standard IT asset management tools. An OT-aware asset discovery process is the foundation of any meaningful security program in a manufacturing context.
Network segmentation with OT/IT boundaries
Creating defensible network boundaries between IT and OT environments, including defined, monitored pathways for data exchange, limits lateral movement and reduces the blast radius of an incident. This does not require replacing production systems. It requires thoughtful network architecture that isolates them from corporate systems while allowing the data flows that operational analytics requires.
Identity and access management across both environments
Identity and access management controls, including MFA, role-based access, least-privilege enforcement, and regular access reviews need to extend to OT environments and vendor access. The frequency with which compromised credentials and MFA misconfigurations appear as root causes of manufacturing incidents makes this a high priority control.
Regular security assessments and penetration testing
Manufacturing environments change continuously. New systems are added, integrations are expanded, and vendors change. Regular security assessments and penetration testing that account for both IT and OT components identify the vulnerabilities that accumulate between major security reviews. Testing should include scenarios specific to manufacturing environments and not just corporate IT attack paths.
Incident response planning that accounts for production
An incident response plan for a manufacturing environment needs to address decisions that don’t exist in a purely corporate IT context: when to take production systems offline, how to operate in manual mode, how to notify supply chain partners, and how to prioritize recovery between IT and OT systems.
See our guide on outsourced incident response for regulated organizations for a deeper look at how to evaluate whether your current IR capability is sufficient for an industrial environment.
Evaluating Your Current Security Posture
Asking a few direct questions can surface the gaps that are most likely to occur in a manufacturing environment:
- Do you have a current, accurate inventory of every OT asset on your network, including devices that don't appear in standard IT asset management tools?
- Is there meaningful network segmentation between your corporate IT environment and your production systems, or do they share network segments without controls?
- Does every vendor with remote access to your OT environment authenticate with MFA, and is that access logged and periodically reviewed?
- Has your incident response plan been tested against a manufacturing-specific scenario (including production disruption and supply chain notification)?
- Do you know which of your OT systems are running unsupported operating systems, and do you have compensating controls in place for those that cannot be patched?
If any of these answers is uncertain, exposure exists.
Manufacturing Cybersecurity Built for Industrial Environments
At AISN, we work with organizations that operate in complex, multi-system environments where standard IT security frameworks need to be adapted to address the specific constraints of industrial operations.
Our managed information security services regularly include security assessments, penetration testing, and identity and access management support that’s structured around the specific risk profile of industrial environments. When we support manufacturers and industrial operators where OT and IT converge, these also tend to include OT‑aware asset discovery, segmentation design, vendor‑access governance, and penetration testing that accounts for both corporate and industrial attack paths.
With a clear goal in mind, the outcomes we reach are consistent: clearer boundaries between production and corporate systems emerge, exposure to ransomware and supply‑chain compromise is reduced, and an organization’s security program becomes aligned to the operational reality of its industrial environment.
If your organization is evaluating its current security posture against the risks specific to a manufacturing environment, contact our team to start the conversation.