Attack Surface Ranked

ASM UNIVERSITY · SEPTEMBER 2026

ASM University: attack surface management lessons and glossary

Quick answer

Nine short lessons in three tracks and a 43-term glossary for teams that run or buy attack surface management tools. Start with Basics, then From finding to fix, then Buying and running. Each lesson takes a few minutes and ends with a link to the next.

What are the tracks?

9 lessons · about 16 minutes in total

Basics

What attack surface management covers, how discovery works, and the public standards behind a finding.

01

What ASM is

What attack surface management covers, what it does not, and where it sits.

2 MIN READ

Read the lesson

02

How discovery works

Seeds, seedless starts, recursive mapping and attribution.

2 MIN READ

Read the lesson

03

CVE, CVSS, EPSS and KEV

The four public standards most findings refer to, and what each one does not tell you.

2 MIN READ

Read the lesson

From finding to fix

What validation proves, how a finding gets closed, and how to attribute assets across a group.

04

What validation proves

How validation differs from scanning, and where it stops.

1 MIN READ

Read the lesson

05

From finding to fix

Owners, tickets, compensating controls and retests.

1 MIN READ

Read the lesson

06

Attribution across a group

Subsidiaries, acquisitions and suppliers: deciding what is yours and who owns it.

2 MIN READ

Read the lesson

Buying and running

How to turn our criteria into requirements, run the program day to day, and measure whether exposure is going down.

07

Writing requirements

Turn seven scoring criteria into requirements a vendor has to answer.

2 MIN READ

Read the lesson

08

Running the program

Owners, approvals for active testing and mitigation, and service levels.

2 MIN READ

Read the lesson

09

Measuring the program

Metrics that show exposure going down, and the ones that only show activity.

2 MIN READ

Read the lesson

Where are the definitions?

Glossary

43 terms, A to W, with sources for terms that come from standards bodies and regulators.

Open the glossary

What should you read next?