Continuous pentesting · CTEM
Test like an attacker. Every week, not every year.
Autonomous, fully managed penetration testing powered by Horizon3.ai NodeZero, run as a Continuous Threat Exposure Management (CTEM) program. We find what an attacker can actually exploit, help you fix what matters most and prove it's fixed, on your schedule.
What gets tested
Attackers move across all of these. We test the paths between them.
Why CTEM
More scan data won't reduce risk. Proof will.
Continuous Threat Exposure Management is a framework, defined by Gartner, with one goal: continuously reducing exposure. Its five stages are scoping, discovery, prioritization, validation and mobilization.
Most organizations already have scanners, alerts and ticketing. What's usually missing is a repeatable way to determine what attackers can actually exploit, focus remediation where it matters and verify the work reduced risk. That's the gap we close.
Read the fact sheet: Operationalize CTEM with NodeZero (PDF)
How it works
Find it. Fix it. Prove it's fixed. Repeat.
NodeZero does the attacking. Our team turns the results into a program your IT team can act on.
- 01 Discover exposure Map the assets that make up your attack surface, from internal devices to internet-facing systems.
- 02 Validate what's exploitable NodeZero safely attacks in production, chaining weaknesses to show how far an attacker could get and what they could reach.
- 03 Prioritize by impact Rank what was proven by the systems, access and data at stake, not by severity scores alone.
- 04 Remediate with clarity Our analysts walk your team through each proven attack path, what to fix and why it matters.
- 05 Verify fixes work Retest a single host or the whole scope to prove the weakness is gone and the attack path is broken.
Measurable progress
Know whether you're actually getting more secure.
Every test builds a track record you can show your leadership, board and auditors.
Annual vs. continuous
A snapshot can't keep up with a moving target.
| Annual pentest | Legion continuous | |
|---|---|---|
| Frequency | Once a year | As often as you need — weekly or monthly |
| Fix verification | Wait for next year's test | Re-test immediately |
| Coverage of change | Misses everything after test day | Catches new exposure as it appears |
| Compliance & insurance | Point-in-time report | Ongoing evidence for PCI, HIPAA, DORA and underwriters |
Need to go deeper?
Pair it with expert-led testing.
Continuous testing keeps your baseline honest. For complex applications, APIs or a realistic adversary scenario, our testers go hands-on.
Common questions
Is this a CTEM program?
Yes. Continuous pentesting with NodeZero puts the CTEM stages into practice: we scope your environment, discover exposure, validate what's exploitable, prioritize by impact and mobilize your team to fix it, then verify the results and repeat.
Is it safe to run in production?
NodeZero is designed to run safely against production systems. We agree rules of engagement with you up front and can exclude anything sensitive.
How often do you test?
As often as you need. Most clients choose a recurring cadence, plus on-demand re-tests after major changes or fixes.
Does this replace a manual pentest?
Not entirely. Continuous testing keeps your infrastructure and web applications covered week to week; expert-led testing goes deep on complex application logic and specific scenarios. Many clients use both.
What do we receive?
Reports after each test, prioritized remediation guidance from our analysts, and evidence you can hand to auditors and insurers.
See your environment the way an attacker does.
Tell us about your environment and we'll send a tailored quote.