Fix the Right CVEs First. Ignore the Noise.
VSAR scores vulnerabilities by operational context, not just CVSS severity
VSAR (Vulnerability Situational Awareness Rating) is TXOne's operational-context vulnerability scoring methodology inside Sennin. It combines CVSS severity with asset exposure, compensating controls, virtual patch coverage, and operational criticality so your team works the 20% of CVEs that actually threaten operations, not the 80% that do not.
Every CVSS Critical Is Not an Actual Emergency.
CVSS tells you how bad a vulnerability could be in isolation. VSAR tells you how bad it is on your specific asset, right now.
A critical CVE on an air-gapped system with virtual patch coverage ranks lower than a moderate CVE on a network-facing asset. VSAR captures that difference. It looks at where the asset sits on the network, what protections already shield it, whether a TXOne virtual patch is in place, and how critical the asset is to operations, then produces a prioritized list that reflects actual risk to your operation, not an abstract severity score.
WHAT IT IS
Capability
What is VSAR?
VSAR is the vulnerability scoring methodology at the core of TXOne Sennin. It ingests asset inventory, protocol and network exposure data, compensating control status, virtual patch coverage from TXOne Edge, and operational criticality tagging, then produces an operationally-weighted risk score per CVE per asset. The result is an 80/20 prioritization: the 20% of CVEs that genuinely threaten your operation rise to the top, while the 80% that do not are de-prioritized with explicit evidence of why. VSAR works alongside approval workflows in Sennin so that remediation proposals from the corporate security team are reviewed and approved by the site before anything deploys on the plant floor.
KEY COMPONENTS
VSAR Challenges
Key challenges that VSAR addresses.
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Every CVSS Critical Reads as Equal Urgency
CVSS scores a vulnerability's theoretical severity without knowing where it lives. A critical CVE on an isolated PLC and a critical CVE on an internet-facing HMI look identical to CVSS. Your OT team cannot patch both in the same week.
Every CVSS Critical Reads as Equal Urgency
CVSS scores a vulnerability's theoretical severity without knowing where it lives. A critical CVE on an isolated PLC and a critical CVE on an internet-facing HMI look identical to CVSS. Your OT team cannot patch both in the same week.
Key Components
Core components of the VSAR capability.
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Operational-Context Risk Scoring
VSAR combines CVSS severity with five operational factors: network exposure, compensating controls, virtual patch coverage, asset criticality, and threat intelligence relevance. A critical CVE on an air-gapped system with virtual patch coverage can rank lower than a moderate CVE on a network-facing asset.
Key Capabilities
Operational-Context Risk Scoring
VSAR combines CVSS severity with five operational factors: network exposure, compensating controls, virtual patch coverage, asset criticality, and threat intelligence relevance. A critical CVE on an air-gapped system with virtual patch coverage can rank lower than a moderate CVE on a network-facing asset.
Key Capabilities
Outcomes
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Risk prioritization on what actually matters
Risk prioritization on what actually matters
PROVEN RESULTS
WHY TXONE
Why VSAR for OT Vulnerability Prioritization
CVSS-only scoring was designed for IT environments where patching is possible and context is generic. OT needs an operationally-weighted view.
CVSS does not know your network, your compensating controls, or your virtual patch coverage. VSAR does, because it reads directly from Edge, Stellar, Element, and Sennin telemetry.
Legacy approach creates operational risk
When TXOne Edge is already blocking exploitation inline, the CVE is still tracked but its priority drops. Gartner's 2025 CPS Vulnerability analysis explicitly endorses virtual patching for environments that cannot patch directly.
Legacy approach creates operational risk
Approval workflows in Sennin mean corporate security proposes and the site approves before anything deploys. Remediation becomes a structured process instead of a friction point.
Legacy approach creates operational risk
26% of CISA advisories have no patch, 18% have neither patch nor mitigation. VSAR acknowledges that reality and scores the compensating control coverage instead of pretending patching is always available.
Legacy approach creates operational risk
VSAR correlates endpoint posture, network exposure, protocol inspection, and external scanner data into one operationally-weighted risk score per asset. SIEM integration (Splunk, Microsoft Sentinel) feeds enterprise reporting without rework.
Legacy approach creates operational risk
NEXT STEP
See How VSAR Scores Your Environment
Schedule a VSAR walkthrough on a representative set of your assets. See how operational context reduces your CVSS critical backlog to the vulnerabilities that genuinely threaten production.