building a modern CTEM program

Cybersecurity leaders aren’t struggling with visibility as much as they are with prioritisation.

With cloud-native apps, identity, SaaS, OT, and more, the attack surface today is much broader than the one traditional programs were designed to address. The consequence is all too familiar: thousands of alerts, disjointed insights, and still, no clear answer to what should be an obvious question: what matters most to the business today?

This is where exposure management and AI-driven exposure assessment enter the picture, with the operational model being Continuous Threat Exposure Management (CTEM).

Why CTEM matters

What problem is CTEM solving?

Traditional security tools are very good at identifying vulnerabilities, but not as good at identifying those vulnerabilities that are actually exploitable and have a significant impact. This issue has become more pronounced as the environment becomes more distributed and interconnected.

CTEM provides a new approach that is continuous and risk-based. It changes the paradigm from detection to exposure. Rather than relying on regular scans and scores that do not change over time, it’s all about the process of discovery, analysis, validation, and action.

At a high level, the benefits of CTEM are:

• The ability to focus on what is actually reachable and exploitable
• A way to focus on business risk rather than technical severity
• Having continuous risk assessments as environments change

The fundamental shift is from “what is vulnerable?” to “what could actually be used against us?”

The five stages of a CTEM program

How do you operationalise exposure management?

CTEM is more of a lifecycle than a tool. Like any good lifecycle, it is iterative.

It begins with scoping. Here, businesses identify what matters most. What are critical assets? What are key business services? What are systems with financial or regulatory implications? Without scoping, prioritisation is soon noise.

Discovery is next, and it is far more complicated than it is made out to be. Environments are in motion. Assets are spinning up and down. Identities are changing. And new risks are emerging every day. Maintaining an inventory of what is in IT, in the cloud, and beyond is foundational.

Once exposures have been defined, prioritisation is the key challenge. This is where context is important. Prioritisation that is effective takes into account:

• Exploit availability and attacker activity
• Asset criticality and business function
• Network exposure and identity access paths

This is where companies go beyond general severity ratings and into something much more actionable.

The fourth stage is validation. This is where realism is introduced. It answers whether this exposure is actually exploitable. This is done by examining attack paths and simulating attacks.

Lastly, there is mobilisation. This is where action is taken. It is where there is integration with workflows, assigning action items, and tracking progress in a measurable way.

Building unified exposure visibility across the attack surface

Why is visibility still such a challenge?

Most organisations have made significant investments in various tools, and the problem is that the visibility is fragmented. Cloud security, identity security, endpoint security, and network security are usually implemented in parallel and generate their own data and priorities.

The problem is that risks don’t exist in silos. Risks are the result of interactions.

Exposure visibility gives the ability to bring these domains together.

• How are the vulnerabilities related between the environments
• How does the identity and access provide unintended pathways
• How does the combination of the weaknesses create real attack opportunities

For example, the configuration of the workload in the cloud could be considered low risk. However, when the permissions are excessive and the workload is exposed, the risk is more obvious.

The connections between the risks are not always obvious unless the cross-domain exposure is considered.

Continuous discovery across a dynamic attack surface

Why isn’t periodic scanning enough anymore?

Because the environment doesn’t sit still.

The nature of cloud-based workloads is ephemeral. Applications are constantly being updated. User roles and permissions are in constant flux. In this environment, periodic assessment is plagued by blind spots, where snapshots are obsolete almost as soon as they’re taken.

Continuous discovery solves this problem by providing real-time visibility into your environment. This is because we recognise that your attack surface is constantly changing, and your risk assessment must follow.

This is particularly critical in:

• Cloud-native environments
• Hybrid infrastructures
• Businesses that are adopting risk-based cloud security models

With no continuous insight, entities are making decisions based on incomplete data.

Prioritising cyber risk with business context

How do you decide what to fix first?

It is in this area that security software often falls short, as the sheer number of vulnerabilities far outweighs the number of ways to address them.

It is in this area that organisations are increasingly turning to AI to help address the problem. It is able to do so by correlating data from different domains, to:

• Identify potential paths of attack
• Uncover vulnerabilities that are actively being exploited
• Correlate technical risks to business risks

This is where the real value of such an approach comes in – not only is it more efficient, but it is also more understandable.

From vulnerability scans to continuous, contextualised exposure insight

What is the role of traditional vulnerability management today?

Vulnerability scanning is still a fundamental technique. Tools like Nessus are very good at finding known weaknesses, misconfigurations, and patch problems.

Scanning, however, is no longer sufficient on its own.

A scanner, by itself, will tell you what you have. It won’t tell you:

• Is the vulnerability reachable?
• How does it get exploited?
• What are the business implications?

As part of a CTEM-based approach, vulnerability information becomes part of a larger model of exposure. It’s augmented, validated against “real world” scenarios, and weighted by relevance.

This is the evolution from simple data collection to decision support.

Integrating CTEM with existing security workflows

How do you make CTEM actionable?

Insight is useless if action is not taken. This is the biggest pitfall in the implementation of cybersecurity initiatives.

The operationalisation of CTEM is the integration of CTEM into existing workflows. This includes:

• Integrating CTEM findings into existing IT and DevOps ticketing systems
• Aligning remediation activities with business priorities and ownership
• Measuring the effectiveness of remediation activities over time

Additionally, there is a need to change the way we communicate CTEM findings. This is so that the findings are communicated in a way that the business can understand.

The most successful organisations in the implementation of CTEM are those that treat the process as a shared responsibility.

The bigger shift: from reactive security to exposure reduction

Exposure management and AI-driven exposure assessment are a result of a larger shift in the world of Cybersecurity. They represent a shift from:

• Alerts to insights
• Volume to context
• Technical severity to business risk
• Periodic review to continuous assessment

This goes beyond a change in tools, to altering how we think about cyber risk.

Prioritisation will be the key differentiator

The attack surface will carry on expanding, and complexity will continue to rise. Therefore, in this environment, the ability to prioritise is going to be the key differentiator.

As organisations continue to mature their CTEM programs, they are no longer just trying to find problems. They are trying to gain a better understanding of their risk and be more proactive.

The key to success is not how many problems are discovered, but how well the risk is reduced.