---
title: Attack Surface
description: Attack surface is the sum of all network, software, and human entry points. Secure assets by leveraging ASM, Zero Trust, and Shadow IT discovery.
---

[Glossary ](https://www.o2oh.com/glossary)

# [Attack Surface](https://www.o2oh.com/glossary/attack-surface)

 Written by [one to ONE Holdings](https://www.o2oh.com/glossary/author/one-to-one-holdings) | Mar 20, 2026 9:04:14 AM

An attack surface includes all potential points, or "attack vectors," where unauthorized users can access data or systems. It is divided into three domains: network, software, and human surfaces.

Reducing the attack surface is a key security principle, accomplished by closing unnecessary ports, minimizing active code, and enforcing strict access controls to limit adversaries' opportunities.

To effectively manage these vulnerabilities, [cybersecurity](https://www.o2oh.com/glossary/cybersecurity) professionals utilize specific frameworks and technologies designed to map and monitor these exposure points. The following key concepts represent the practical application of attack surface reduction within modern enterprise environments:

- ASM (Attack Surface Management) tools: Continuous discovery of internet-facing assets.
- Vulnerability vs. Attack Surface: Distinguishing between specific flaws and general exposure.
- [Zero Trust](https://www.o2oh.com/glossary/zero-trust) Architecture principles: Minimizing the surface by verifying every access request.
- Shadow IT discovery methods: Identifying unauthorized systems that expand the surface.

 

[View full post](https://www.o2oh.com/glossary/attack-surface)

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