Asset discovery tells you what IT exists in your environment. Exposure management tells you what will get you breached. If your platform can’t connect vulnerabilities, identities, misconfigurations, and AI systems into real attack paths, you don’t have exposure management. You have inventory.
Key takeaways
- True exposure management requires more than asset inventory. It’s about merging vulnerability management, attack path analysis, and identity security across on-prem and cloud environments to uncover toxic risk combinations and prioritize remediation.
- Unlike tools focused on asset discovery that rely on limited passive listening, a leading exposure management platform uses diverse detection methods to detect deep-seated security gaps and pinpoint the most critical ones.
- Seek an exposure management platform that offers a unified framework to discover approved and unapproved AI, map its complex workflows, and enforce governance policies across the entire AI lifecycle.
Unsurprisingly, the list of vendors claiming to offer exposure management platforms grows by the day. The reason? Everyone now agrees with what Tenable has known for years: An exposure management program is critical to successfully prevent and fend off modern cyber attacks, especially now, in the AI era.
Recently, vendors of cyber asset attack surface management (CAASM) and other “discovery-first” tools — which passively scan your network to build voluminous asset inventory lists — have been jumping on the exposure management bandwagon.
These vendors tend to offer broad visibility through passive network monitoring and third-party API integrations. Their approach prioritizes breadth over depth. But in cybersecurity, comprehensive visibility is table stakes. What’s crucial is pinpointing the threats that you need to fix now.
When evaluating offerings from these vendors, ask yourself: Are you looking to build a better asset inventory, or are you trying to proactively close exposures and prevent attacks?
In this blog, we’ll explain in detail how vendors of IT asset inventory software and CAASM tools fall short of delivering the invaluable benefits of an integrated exposure management platform like Tenable One. In addition to inventorying all of your IT, OT, and cloud assets across your attack surface, Tenable One also assesses them for vulnerabilities, misconfigurations, and excess permissions, maps these exposures into attack paths, then prioritizes them for remediation based on exploitability and impact.
1. Authoritative data vs. incomplete assumptions
Knowing a device exists is just the beginning. Visibility alone isn’t security.
Vendors of IT asset-inventory software often rely only or primarily on passive network monitoring and on third-party data collected via APIs. And they make this weakness sound appealing: no agents to manage and no need to “touch” the devices — just listening to traffic.
However, passive monitoring has a fundamental flaw: It relies on devices “talking” to be detected. If a device is silent or “talks” infrequently, it stays in the shadows of your network.
In addition, the data collected through passive monitoring is often superficial, especially if network traffic is encrypted and if the monitoring tool is not capturing full network packets. It might show you that a laptop exists, but it can’t tell you what software is running on it or what security issues put it at risk?
Passive discovery also misses entire categories of vulnerabilities, like outdated dynamic link libraries (DLLs), compromised registry keys, and risky misconfigurations that only an active scanner or agent can find.
Moreover, passive monitoring tools are often victims of the data provided by third-party APIs. If the source data is truncated or inaccurate, these tools just give you noise: a high quantity of low-quality data.
Tenable One doesn’t “guess” based on network traffic or metadata. It uses a combination of methods for collecting rich asset and exposure data: agents, active scanners, passive listening, API integrations and insights from our world-class security research team to give you a 360-degree view of your assets and of their security weaknesses — on prem and in the cloud. Our robust exposure data fabric maps relationships across 1.5 billion assets, 150 billion threat artifacts, and 1.4 billion security configurations.
In short, we don’t just aggregate comprehensive first-party and third-party data. We normalize, correlate, analyze, conte
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