See your attack surface before attackers do.
We scan everything visible from the outside of your organisation and surface every weakness before it can be exploited.
1.35
High-risk findings per external scan. 69% more than internal networks.
BSO State of Vulnerability Management 2025
60%
Of breaches involve an unpatched external vulnerability known for over 30 days
Ponemon Institute
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EXTERNAL VULNERABILITY SCANNING · VM
Every exposed port is an open door. If you are not scanning it, someone else is..
What is External Vulnerability Scanning?
External Vulnerability Scanning continuously tests your public-facing assets: domains, IP addresses, open ports, and exposed services, identifying weaknesses before they can be exploited. As part of Cyber Exposure Management, it forms the critical first layer of visibility into your attack surface.
How does BlackstoneOne help?
BlackstoneOne continuously scans your external infrastructure to identify known vulnerabilities and misconfigurations. We scan everything visible from the outside of your organisation. Each finding lands in your dashboard with a severity rating and clear remediation steps, so your team prioritises the right issues at the right time.
How it works
Continuous external scanning in three steps.
Scan external assets
Domains, IPs, ports and exposed services. Automated and continuous.
Surface findings
Every vulnerability ranked by severity, with zero duplicates
Remediate & monitor
Act on AI-guided steps and track progress in the dashboard
What we scan
Everything visible from outside your organisation.
Every domain and subdomain associated with your organisation, including forgotten campaign sites and legacy assets.
All publicly reachable IPs and ports across your external infrastructure, flagged when exposed unnecessarily.
Unintentionally exposed services: databases, admin panels, and APIs that should not be reachable from the internet.
Matches your external assets against the global CVE database so you know which weaknesses attackers are targeting.
1.35
High-risk findings per external scan on average across Nordic organisations
BSO 2025 State of Vulnerability Management
75%
Of transportation sector external vulnerabilities are software supply chain failures. The highest single-category concentration across all sectors.
BSO State of Vulnerability Management 2025
60%
Of breaches involve a known external vulnerability left unpatched for over 30 days
Ponemon Institute
Before & after
What changes when you scan continuously.
✗ Without External Scanning
✗ Blind to what's visible from the outside
✗ Annual penetration tests leave 364-day gaps
✗ Forgotten subdomains and legacy IPs go unmonitored
✗ Attackers discover your weaknesses before you do
✓ With BlackstoneOne
✓ Full visibility into your external footprint, updated daily
✓ Every finding ranked, explained, and actionable
✓ New assets automatically detected and added
✓ Continuous coverage, not a once-a-year snapshot
Get a free trial
See your full external footprint in 24 hours.