The CTEM Security Divide Is Growing. Which Side Are You On?

Why enterprises that have adopted Continuous Threat Exposure Management are pulling ahead — and what the rest need to do right now.

There’s a divide forming inside enterprise security programs, and it has nothing to do with budget size, company sector, or the sophistication of individual security professionals. It comes down to a single strategic decision: whether an organization has operationalized Continuous Threat Exposure Management (CTEM) — or whether it hasn’t.

Recent industry research makes this split impossible to ignore. While the overwhelming majority of senior security leaders recognize the importance of CTEM, only a small fraction have actually translated that awareness into an operational reality. The chasm between knowing and doing is more than a missed opportunity. It is a widening performance gap that is actively separating organizations capable of managing modern cyber risk from those that are steadily falling behind.

Awareness Is Not a Strategy

It would be tempting to look at that broad awareness and conclude that the industry is on the right track. It isn’t. Awareness without execution is, in practice, the same as ignorance because attackers don’t pause while organizations figure out their priorities.

The reason so few organizations have crossed the threshold from conceptual understanding to operational deployment isn’t a lack of information. Security leaders understand what CTEM is. Gartner first introduced the framework in 2022 precisely because the industry needed a structured, programmatic approach to move beyond reactive, point-in-time vulnerability scanning toward continuous exposure management.

Organizational inertia, competing budget priorities, and the difficulty of demonstrating clear ROI to executive leadership have conspired to keep the vast majority of enterprises stuck in an approach to security that simply does not scale with the threat environment they face.

Meanwhile, the small cohort of organizations that have made the investment are demonstrating measurably superior outcomes across every dimension of security maturity, and the distance between them and the rest is growing.

Attack Surface Complexity Is a Direct Risk Multiplier

The modern enterprise attack surface is not what it was five years ago. The expansion of cloud infrastructure, the proliferation of IoT and OT devices, the normalization of remote work, and the sprawl of third-party integrations have collectively produced environments of staggering complexity. These are environments that no periodic scan or annual penetration test was designed to handle. And at the center of that complexity is a visibility problem that most organizations have yet to fully reckon with.

Unknown and unmonitored assets are exactly the entry points that sophisticated threat actors seek out and exploit.

They are the gaps in the perimeter that don’t show up in a quarterly vulnerability scan, because they were never in scope to begin with.

An unmanaged IoT device on the factory floor. An acquired company’s legacy OT environment, integrated into the network before anyone fully understood what was in it.

These are not edge cases. They are the everyday reality of modern enterprise infrastructure and they represent open doors for attackers operating in an environment where defenders are still working from an incomplete map.

This is the mathematical expression of a visibility gap. Each additional asset, domain, and integration introduces new risk. At scale, manual tracking collapses under its own weight. Ownership becomes unclear. Blind spots multiply. Traditional periodic security models were never designed to manage this kind of complexity.

Patch Management Was Already Tough, Now There’s Claude Mythos and AI-Based Exploits?

There’s a new wrinkle in the attack surface in 2026 and beyond: the soon-to-be rapid pace of exposure in new vulnerabilities and exploits triggered by frontier AI models.

As we explained in “Claude Mythos: When Zero-Day Vulnerabilities Outpace Defenses”, many vulnerabilities are discovered faster than organizations can plan to respond. In many cases, patches do not yet exist, and traditional vulnerability management workflows are too slow to keep pace. For critical infrastructure, vulnerabilities can typically be patched only every few months to avoid disruptions to energy supply and manufacturing processes. In hospitals, security response has to be balanced against the risks to patient safety. Claude Mythos just multiplied this problem exponentially, which means more vulnerabilities will be available for longer for attackers to exploit.

Watch our CTO, Justin Foster, discuss what Claude Mythos means for your defenses:

To remain resilient, organizations must evolve beyond reactive security models into proactive approaches. Continuous visibility, real-time exposure assessment, and adaptive segmentation and control mechanisms are becoming essential capabilities for mitigating risk in this new era.

The Problem with Traditional Vulnerability Management

To understand why CTEM matters so much, it helps to understand precisely what it replaces and why what it replaces is no longer sufficient.

Traditional vulnerability management tools were built around a straightforward model: scan for known CVEs, score them using CVSS, and prioritize based on severity.

For a simpler, more static threat environment, this approach was adequate.

Modern enterprise environments now include operational technology and industrial control systems, IoT endpoints, unmanaged and shadow IT assets, medical devices, cloud workloads, and third-party integrations — a heterogeneous, constantly changing ecosystem that no point-in-time scan can fully capture.

According to Forescout’s own Vedere Labs research, the scale of the threat environment is staggering: 900 million cybersecurity attacks occurred in 2024 alone, with a 114% year-over-year increase in total attacks and a 668% surge in critical infrastructure incidents from 2022 to 2024.

Ransomware attacks are running at 20 per day in 2025, and zero-day attacks have increased 46% year-over-year.

Against that backdrop, a tool that focuses narrowly on known CVEs and periodic assessment cycles is not a security strategy. It is an exercise in false confidence.

CTEM reframes the question entirely. Rather than asking “What CVEs exist in my environment today?”, a CTEM program asks “What exposures – including misconfigurations, policy violations, risky behaviors, and unmanaged assets – represent exploitable risk to my business right now, and, what is the fastest, most impactful path to remediating them?”

It is a continuous program, not a product. And it requires comprehensive asset visibility as its foundation because you cannot manage risk in assets you cannot see.

Visibility Is the Foundation, But It Has to Cover Everything

Here is where many organizations make a critical mistake in their early CTEM efforts: they scope the program too narrowly. They focus on the assets they already know about — managed endpoints, known servers, familiar network segments — and treat the rest as out of scope.

In doing so, they are essentially designing their CTEM program around the portions of their environment that are already reasonably well-managed, leaving the highest-risk assets unaddressed.

A genuinely effective CTEM program demands comprehensive, real-time visibility across the full attack surface. That means managed and unmanaged devices. IT, OT, IoT, and IoMT. Physical and virtual. Cloud and on-premises. It means knowing not just that an asset exists, but understanding its configuration, patch level, security posture, and risk profile — continuously.

Without this level of intelligence, the prioritization, validation, and mobilization stages of CTEM are built on an incomplete picture. Security teams end up ranking the risks they can see while remaining blind to the risks that are most likely to be exploited.

From Reactive to Resilient

The performance difference between organizations that have committed to CTEM and those that haven’t is not subtle. It shows up across every dimension of security maturity — from attack surface visibility, to threat awareness, to supply chain risk management.

But perhaps most importantly, it shows up in posture: the difference between a security program that is continuously working ahead of the threat and one that is perpetually catching up to it.

Organizations that implement CTEM are not just responding to threats more effectively. They are structurally less likely to be breached in the first place, because they are continuously identifying and closing the exposures that breaches depend on. They have moved from reactive patching – finding out what is broken after the fact – to proactive exposure management, where the team is working with a real-time, prioritized picture of risk and a clear path to reducing it.

This is what resilience actually looks like in practice. Not the absence of threats – no security program can promise that – but the organizational capability to see exposures clearly, prioritize them intelligently, validate that remediations are effective, and mobilize response faster than attackers can exploit what remains.

For enterprises not yet embracing CTEM, the message is clear: the gap between your security program and that of a CTEM-mature organization is not closing on its own. Every quarter that passes without a structured CTEM program is a quarter in which the attack surface grows, complexity increases, and the window of exploitability for unknown and unmanaged assets widens.

The Imperative to Act

The case for CTEM has never been stronger, and the cost of inaction has never been clearer. With average breach costs now exceeding $4 million, regulatory frameworks like PCI DSS 4.0.1 raising the bar for continuous monitoring, and threat actors operating at a pace and scale that periodic security simply cannot match, the question for enterprise security leaders is no longer whether to build a CTEM program. It is how to get there — and how to achieve it quickly.

Closing the gap starts with a clear-eyed assessment of where your organization stands. What assets are you managing? Which ones are you missing? Are you operating with real-time visibility across your full attack surface, or are you relying on a snapshot that was accurate as of the last scan? Can you enumerate every unmanaged endpoint, every IoT device, every OT system connected to your network?

If the honest answer to any of those questions is “no” or “I’m not sure,” then the work of building a CTEM program begins with visibility.

The organizations that are pulling ahead on cyber resilience are not doing so because they have larger budgets or more sophisticated teams. They are ahead because they made a deliberate choice to treat cyber risk as a continuous management problem rather than a periodic compliance exercise. That choice is available to every enterprise. The only variable is when they make it.

Forescout helps organizations operationalize CTEM at scale — with agentless, real-time asset discovery and continuous exposure management across IT, OT, IoT, and IoMT environments. See how Forescout can serve as the foundation of your CTEM program.