Attack Surface Penetration Testing
Discover every exposed asset before attackers do.
What this assessment covers.
Your external attack surface is larger than you think. DERISK’s Attack Surface Penetration Testing service provides visibility into your organisation’s external footprint by identifying exposed assets, internet-facing systems, domains, services, and potential entry points.
The assessment helps organisations discover unknown risks, identify security gaps, and understand their exposure from an attacker’s perspective. We map your entire external attack surface and prioritise the risks that matter most, enabling you to eliminate unnecessary exposure before it becomes a security incident.
How we test.
A structured, expert-led methodology from initial reconnaissance through to real-time reporting and remediation guidance.
- 01
External Asset Discovery
We enumerate every internet-facing asset tied to your organisation — domains, subdomains, IP ranges, cloud instances, and shadow IT — to build a complete inventory of your external footprint.
- 02
Technology Fingerprinting
We identify the technologies, frameworks, versions, and services running on each discovered asset to understand what an attacker would target first.
- 03
Exposure Assessment
We evaluate each asset for open ports, misconfigured services, outdated software, and unnecessary exposure that an attacker could exploit.
- 04
Risk Prioritisation
We rank discovered exposures by exploitability and business impact so your team can focus on closing the most dangerous gaps first.
- 05
Real-time findings published to the DERISK PTaaS portal
All discovered assets and exposures are published to the PTaaS portal as they are found, giving you a live view of your external attack surface.
- 06
Reporting & Continuous Visibility
You receive a complete asset inventory alongside a prioritised report, with ongoing monitoring to detect new exposures as your environment evolves.
Why teams choose us.
Expert-led, manually validated, and delivered through the DERISK PTaaS platform for continuous visibility and rapid remediation.
Outstanding Features
- ✓Comprehensive visibility across your internet-facing attack surface
- ✓Continuous exposure monitoring through the DERISK PTaaS platform with asset inventory and risk tracking
- ✓Discovery of unknown and shadow IT assets
- ✓Prioritised risk assessment from an attacker’s perspective
Why Choose Our Service?
- ▸Complete asset visibility: Discover internet-facing assets that traditional inventories often miss
- ▸Continuous monitoring: Detect newly exposed assets and configuration changes as your environment evolves
- ▸Prioritised exposure management: Focus on risks with the highest likelihood of exploitation
- ▸Reduced attack surface: Eliminate unnecessary exposure before it becomes a security incident
Frameworks & standards.
Testing is aligned with industry-recognised frameworks and standards to ensure comprehensive, repeatable coverage.
What you receive.
Everything you need to understand, prioritise, and remediate findings — delivered through the platform with ongoing validation.
Attack Surface Pentest questions.
Why does attack surface testing matter if we already run pentests?
Scheduled pentests cover the assets you remembered to scope. Attack surface testing finds the ones you did not: decommissioned subdomains still resolving, staging environments exposed to the internet, forgotten third-party integrations. Attackers find these first.
How is the attack surface discovered?
Agentic AI continuously enumerates subdomains, endpoints, servers and applications associated with your organisation, then fingerprints technologies and exposures. Confirmed assets feed straight into testing rather than sitting in an inventory.
Is this a one-off exercise or ongoing?
Ongoing. Your surface changes every time a team ships, so discovery runs continuously and new exposures are tested as they appear rather than waiting for the next assessment cycle.
How are findings delivered?
Every engagement runs through the DERISK PTaaS platform, so findings appear live rather than in a PDF weeks later. You get real-time results, collaborative remediation, on-demand retesting, remediation tracking and native Jira and Slack integration.
Often scoped together.
External Network Pentest
Simulate an attacker targeting your internet-facing systems from the outside.
Vulnerability Assessment
Systematic scanning to identify and prioritise known weaknesses.
DAST
Continuous automated scanning of your live web applications.
Network Pentest
Simulate real-world attacks across your external, internal, AD, and wireless networks.
Ready to secure your assets with Attack Surface Pentest?
Get in touch with DERISK to schedule an assessment or learn more about how our expert-led testing can strengthen your security posture.
Request a demo ↗