Tenable One — exposure management in action
CVSS rates 20-25% of vulnerabilities as Critical or High — creating an unmanageable remediation backlog. Tenable's VPR uses machine learning to reduce this to the 3-5% of vulnerabilities that are genuinely likely to be exploited in the real world.
Exposure management, every surface.
From the Nessus scanner trusted by pen testers for over two decades, to Tenable One — the industry's first unified exposure management platform spanning IT, cloud, OT, and identity.
Tenable One
Tenable One is an AI-driven exposure management platform that consolidates vulnerability management, web app scanning, cloud security, identity exposure, and OT security into a unified risk view. Lumin provides predictive prioritisation — scoring assets by Attack Path and Cyber Exposure — so you fix what matters most first.
Tenable Vulnerability Management
The leading SaaS vulnerability management platform, providing continuous, comprehensive visibility across all assets — cloud, on-premises, web apps, containers, and identities. Vulnerability Priority Rating (VPR) uses machine learning to predict which vulnerabilities are most likely to be exploited, cutting remediation noise by up to 97%.
Nessus Professional
The most widely deployed vulnerability scanner in the world — used by over 30,000 organisations and security professionals. Nessus Professional supports 174,000+ plugins, covering virtually every CVE published, plus compliance audits (CIS, DISA STIG, PCI DSS). Available as Nessus Professional and Nessus Expert (adds cloud asset scanning).
Tenable OT Security
Purpose-built for industrial environments — Tenable OT Security provides passive and active asset discovery across OT/ICS/SCADA environments. Supports Purdue Model network segmentation analysis, ICS-specific vulnerability detection (e.g., Siemens, Rockwell, Schneider), and integration with Tenable One for unified IT/OT risk visibility.
Tenable Cloud Security
Agentless cloud security for AWS, Azure, and GCP — scanning for misconfigurations, excessive IAM permissions, and container vulnerabilities. Combines CSPM (Cloud Security Posture Management) and CIEM (Cloud Infrastructure Entitlement Management) to enforce least-privilege access across cloud accounts at scale.
Tenable Identity Exposure
Continuous Active Directory security assessment that identifies misconfigurations, attack paths, and real-time AD attacks — including Kerberoasting, Pass-the-Hash, DCSync, and BloodHound-style lateral movement paths. No agent or Domain Controller modification required. Surfaces attack paths from AD to Tier 0 assets.
From Nessus to full exposure management.
Start with Nessus Professional for targeted scanning, or deploy Tenable Vulnerability Management for continuous enterprise coverage — then expand to Tenable One for full exposure management.
The world's most widely-deployed vulnerability scanner for security professionals and pen testers.
- ✓174,000+ plugins — largest database
- ✓Unlimited IP scanning
- ✓Compliance audits: CIS, DISA, PCI DSS
- ✓Real-time vulnerability detection
Continuous SaaS vulnerability management with VPR prioritisation and asset-based licensing.
- ✓Continuous asset discovery
- ✓VPR AI-based prioritisation
- ✓Web app & cloud asset scanning
- ✓90-day scan history & reporting
On-premises vulnerability management for air-gapped or compliance-restricted environments.
- ✓On-premises deployment (no cloud)
- ✓Unlimited Nessus scanner integration
- ✓Full API and SIEM integrations
- ✓Air-gap and classified network support
Full Tenable One — unified exposure management across VM, web apps, identity, cloud, and OT.
- ✓Unified Exposure View (Lumin)
- ✓Attack Path Analysis & prioritisation
- ✓Identity Exposure (AD/Entra ID)
- ✓OT/ICS add-on available
Tenable licensing is asset-based (per asset per year). Contact Servnet for UK enterprise licensing →
Why organisations choose Tenable
Tenable has been named a Leader in the Gartner Magic Quadrant for Vulnerability Assessment for consecutive years. Nessus is the world's most widely-deployed vulnerability scanner, used by the US DHS, UK NCSC partner organisations, and 65% of the Fortune 500.
Tenable's Vulnerability Priority Rating (VPR) uses machine learning to score each vulnerability by its real-world exploit likelihood — not just CVSS severity. VPR-guided remediation has been shown to reduce the actionable patch list by up to 97%, letting teams focus on what truly matters.
Tenable's 174,000+ Nessus plugins cover more CVEs than any competing scanner. Tenable detects vulnerabilities across IT infrastructure, web applications, cloud workloads, OT/ICS devices, Active Directory, and mobile — a coverage breadth no other single vendor can match.
Tenable One is the only platform that gives security teams a unified risk view across traditional IT infrastructure and operational technology (OT/ICS/SCADA). This is critical for manufacturing, utilities, and critical infrastructure operators who need to manage cyber risk across both environments without separate tools.
Tenable One includes Attack Path Analysis — an AI-driven capability that maps how an attacker could traverse from a low-privileged initial foothold to critical assets, accounting for vulnerability chains, AD misconfigurations, and misconfigured cloud permissions together.
Tenable is trusted by more than 40,000 organisations across 160 countries, including 65% of the Fortune 500. Tenable was founded in 2002 by the original creator of Nessus and has maintained its position as the vulnerability management industry standard for over two decades.
Which Tenable product is right for you?
Frequently asked questions
Tenable One is Tenable's exposure management platform — a SaaS solution that unifies vulnerability management, web application scanning, cloud security posture, identity exposure (Active Directory/Entra ID), and OT security into a single platform. It provides the Lumin Exposure View — a business-risk-oriented dashboard that translates technical vulnerabilities into a Cyber Exposure Score, benchmarkable against industry peers. Attack Path Analysis maps attack routes from exposed assets to critical systems using AI.
Nessus is the world's most widely-deployed vulnerability scanner. Nessus Professional is aimed at individual security practitioners, pen testers, and IT teams — providing unlimited IP scanning with 174,000+ plugins covering virtually every published CVE. Nessus Expert adds cloud infrastructure scanning and external attack surface discovery. Tenable Vulnerability Management is the SaaS equivalent for teams that need continuous scanning at enterprise scale.
VPR is a Tenable-developed machine learning score (0-10) that predicts the real-world exploit likelihood of a vulnerability. Unlike CVSS, which is a static severity score based on vulnerability characteristics, VPR factors in active threat actor exploitation data, dark web activity, public proof-of-concept availability, and asset criticality. VPR-prioritised remediation has been shown to reduce the effective patch list by 97% compared to CVSS-only prioritisation.
Tenable OT Security (formerly Indegy) is purpose-built for ICS/SCADA environments. It uses a combination of passive network traffic analysis (no active scanning that could disrupt PLC/HMI devices) and safe active querying to discover assets across Purdue Model levels 0-3. It identifies known OT vulnerabilities (Siemens, Rockwell, Schneider, Honeywell etc.), detects configuration changes, and can be integrated with Tenable One to give a unified IT/OT risk view.
Tenable Identity Exposure continuously monitors Active Directory and Azure AD/Entra ID for over 150 attack indicators — misconfigurations (unconstrained delegation, weak Kerberos settings, stale accounts), active attacks (Kerberoasting, DCSync, NTLM relay), and attack path chaining. Critically, it requires no agent on Domain Controllers and no modifications to AD — making it non-invasive and suitable for sensitive enterprise environments.
Tenable Vulnerability Management (formerly Tenable.io) is a cloud-hosted SaaS platform — scanning results and data are stored and processed in Tenable's cloud. Tenable Security Center (formerly SecurityCenter) is an on-premises deployment where all data stays within your environment. Security Center is preferred by organisations with air-gapped networks, strict data sovereignty requirements, or classified environments. Both use the same underlying Nessus scanning engine.
Deploy Tenable with Servnet
Servnet handles Tenable licensing, asset scoping, scanner deployment, and integration with your SIEM or ticketing system — with UK-based support throughout.
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