We own a category competitors ignore
Most UK managed providers have no attack surface management offering at all. We do, on a leading platform.
External attack surface management on Tenable One
Attack Surface Management
Attackers do not work from your asset list. They scan the entire internet, indiscriminately, looking for a way in: a forgotten subdomain, an exposed admin panel, an expired certificate, a server someone span up and never decommissioned. The NCSC calls the goal the "defender's edge": having the same, or better, visibility of your online systems as the people trying to break in. We give you that. Continuous discovery of your internet-facing estate, including the assets you did not know you had. On Tenable One, from a security firm assessing UK organisations since 2014.
The problem
You cannot secure what you cannot see
Most organisations do not have a complete record of their entire online estate. The NCSC says so directly.
Cloud instances spun up and forgotten. A subdomain from a campaign three years ago. A supplier-built portal nobody owns. An asset inherited in an acquisition. Each one is a door, and you cannot lock a door you do not know is there.
Traditional vulnerability scanning only checks the assets you point it at. It cannot find what is not on the list. Attack Surface Management works the other way round: outside in, from the attacker's perspective, continuously discovering what is actually exposed to the internet under your name.
Attack Surface Management (ASM) is the process of identifying, monitoring and reducing the assets exposed to attackers. External Attack Surface Management (EASM) focuses on internet-facing assets, discovering unknown and forgotten ones from an attacker's perspective, unlike scanning that only checks known assets.
The work
What we do
Outside-in discovery, attribution, continuous monitoring, and a clean line into remediation.
See what's exposed-
Discover, outside in
Continuous discovery of your internet-facing assets: domains and subdomains, IP addresses, exposed services and ports, TLS certificates, and the technologies behind them.
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Find the unknowns
The point of ASM is the assets you did not declare: shadow IT, forgotten services, decommissioned-but-still-live servers, acquired estate. We surface them.
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Attribute and organise
Each asset comes with rich context, so you know what it is, where it sits, and whether it is really yours.
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Monitor continuously
Your attack surface changes daily. We monitor for new exposures and alert you when something appears, not at the next quarterly review.
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Feed the fix
Discovered assets flow into our vulnerability management pipeline, so an exposed asset gets scanned, prioritised and remediated, not just listed.
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Validate the serious ones
Our CREST-qualified and Cyber Scheme testers can probe a critical exposure to confirm real risk.
Your partner
Why manage it with
We discover, then we fix
Discovery is only useful if it leads to action. We feed exposed assets straight into vulnerability management and remediation. No dead-end list.
We align to the NCSC, not to jargon
We speak the language of the NCSC buyer's guide, so what we deliver maps to UK guidance your auditors recognise.
We bring the offensive edge
In-house CREST-qualified and Cyber Scheme testers validate the exposures that matter.
North East based
Local to the North East. Visible everywhere you are.
We are based in Northumberland and work with organisations across Newcastle, Durham, Sunderland and the wider North East, then UK-wide. Your attack surface does not stop at the region, and neither do we: wherever your internet-facing assets sit, we find them.
The process
How it works
Four steps, fixed price, clear deliverables. Continuous from the first seed on.
Book a scoping call-
Seed and discover
We start from your known domains and brands, then continuously discover everything connected to them.
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Attribute and review
We confirm what is genuinely yours and organise it into a live inventory.
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Monitor and alert
Continuous monitoring for new and changed exposures, with alerts when they appear.
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Prioritise and remediate
Exposed assets flow into scanning and remediation, validated where it counts.
Across the lifecycle
Beyond attack surface management
ASM is the discovery front end of the Manage pillar. What it finds flows into Continuous Vulnerability Management and Continuous Patch Management. It also sharpens penetration testing, by making sure nothing in your external footprint is missed. Cyber Essentials sets the baseline; this keeps your scope honest. One firm, across the lifecycle.
Questions
Attack surface management FAQs
What is attack surface management?
Attack Surface Management is the process of identifying, monitoring and reducing the assets exposed to attackers. It gives you a continuous, attacker's-eye view of everything reachable, so you can find and close exposures before they are exploited.
What is external attack surface management (EASM)?
EASM is the subset of attack surface management focused on internet-facing assets. It continuously discovers your public-facing estate from an attacker's perspective, including unknown and forgotten assets, which traditional scanning of known assets cannot find.
How is ASM different from vulnerability management?
Vulnerability management scans the assets you already know about and finds their weaknesses. ASM works outside in to discover assets you did not know you had. ASM finds the doors; vulnerability management checks whether they are locked. You need both, and we run both.
Why does attack surface management matter?
Because attackers indiscriminately probe millions of internet-facing assets with little effort, and most organisations do not have a complete record of their own online estate. A single forgotten, exposed asset can be the way in. ASM closes that visibility gap.
What kinds of assets does ASM discover?
Domains and subdomains, IP addresses, exposed services and open ports, TLS certificates and their expiry, and the technologies and versions running. Crucially, it surfaces shadow IT and forgotten or decommissioned assets still live on the internet.
How is ASM different from a penetration test?
A penetration test is a deep, point-in-time exercise against a defined scope. ASM is continuous, broad discovery of your whole external footprint. ASM tells you what to test and protect; a penetration test proves how exploitable a target is. We offer both.
What platform do you use?
Tenable Attack Surface Management, part of Tenable One. It is built on a continuously updated map of more than 5 billion internet assets, with rich context on each, so discovery and attribution are accurate and current.
Find it before they do
Continuous, outside-in discovery of your internet-facing estate, including the assets you forgot. On Tenable One, validated by CREST-qualified testers, from a security firm trusted since 2014.