During due diligence, security teams usually don’t have access to the internal environment of the organization being acquired or merged with. Exposure Management – especially External Attack Surface Management at this point – lets them build a valuable external view: internet-facing assets, legacy systems, unsupported applications, misconfigurations, and stolen credentials of employees and non-employees. This initial assessment of external risk helps decision-making around the terms of the deal or the project scope.
We find that the common pitfalls to watch for are:
1. Legacy systems and applications – systems that can’t be patched or are no longer supported, or environments with outdated remediation processes or no clear ownership. By analyzing the holistic attack graph and finding the entities leading to legacy systems you can find alternatives and shut down attack paths that can compromise them.
2. Maturity mismatch - one company might have a structured, prioritized approach to Exposure Management, while the other is still reacting to every CVE. If you don’t catch that during integration planning, you’re going to run into delays, miscommunication, and risks that don’t get addressed properly.
3. Compliance gaps - any compliance violations that exist in the acquired environment will impact liability upon the next audit. You need a solution that can discover these violations as early as possible in order to address them.
Before a deal closes, access is limited. Security teams often have to work with what’s available from the outside. Exposure Management helps identify internet-facing assets, legacy systems, expired certificates, and outdated software – without needing internal access. It gives security teams a way to start building a risk profile and spot signs of technical debt or neglected systems.
Once the acquisition goes through there is a way to conduct a more in-depth risk assessment. Exposure Management discovers all exposure types across the hybrid environment of the target company and builds an attack graph of how an attacker can compromise critical business assets. It allows tracing lateral movement paths, run identity and privilege audits, and scan for misconfigurations across infrastructure and endpoints. It’s not just about visibility anymore – it’s about internal validation and impact. By driving remediation of just the most critical, validated threat exposures, you can ensure effective integration with less risk and faster results.
Although the two companies may have very different risk profiles, you have to set a unified baseline to allow reporting on meaningful risk to leadership. It gives you a way to measure progress and spot where the biggest gaps are. You might not be able to bring everything into a single platform, but you can agree on what ‘good’ looks like – what needs fixing and where the priorities are. Security scores or shared risk indexes can help, especially when you’re trying to compare two environments that work differently.
The right Exposure Management tools can help you avoid surprises such as “shadow IT”, legacy systems, or identity and access exposures that were not in focus. They show you what’s exposed, what’s outdated, and what needs attention right now. That kind of clarity means less scrambling. You can focus on the work that matters – remediation, consolidation, cleanup – without getting bogged down in noise.
Attackers often target companies during deals, when things are in flux. That makes it even more important to get ahead of any gaps early. Exposure Management gives you the information you need to make smart decisions before problems land in your lap.
If the plan is full integration, then Exposure Management should help you figure out where the biggest risks are, what systems can be merged, and what needs to be cleaned up. If the companies are going to run side by side, the goal shifts – now you’re looking at how they connect and how to keep those connection points secure.
When two companies come together, Exposure Management gets tricky. You’re not just dealing with different tools – you’re dealing with different ways of thinking about risk. One team might have a solid process for tracking and prioritizing issues. The other might be in constant firefighting mode, just trying to keep up.
Trying to force everyone into one framework right away usually doesn’t work. A better move is to start with shared visibility. Get both sides looking at the same data, and using the same language when they talk about risk. (Want to learn more about creating a common language for risk? Read this blog about how to get teams on the same page.)
Then focus on the areas where the two environments actually touch – things like identity, access, and shared infrastructure. That’s where misalignment causes the most problems.
Definitely. During M&A, you’re not just worried about vulnerabilities – you’re also inheriting someone else’s compliance posture. Exposure Management helps you spot the stuff that could cause trouble, like outdated encryption, misconfigured systems, or sensitive data sitting in the wrong place. The right platform will help with automating audit preparation, risk scoring, and surfacing gaps – so you’re not scrambling to prove compliance after the fact.
Tech acquisitions come with a different level of risk. You’re not just picking up a few systems – you’re taking on cloud infrastructure, APIs, remote access tools, maybe even some IoT. That’s a lot of surface area, and a lot of places where things can go wrong. The first step is always visibility – how the cloud environment is set up, who has access, whether MFA is in place, and if any outside vendors still have their foot in the door. It also helps to look back at their incident history. Have they been breached? Were there any close calls?
Cross-border deals often involve a new legal landscape. Every country has its own rules, its own definition of what “secure” looks like, and its own way of doing things. Exposure Management can help by building risk profiles that match the local context, allowing you to filter risk based on region, which helps keep the noise down and the focus clear.