NIS2 Vulnerability Management: Building Automated Discovery and Coordinated Disclosure Infrastructure

NIS2 Article 21(2)(e) mandates "vulnerability handling and disclosure" as part of network and information system security. This means more than running a monthly vulnerability scan. You need continuous vulnerability discovery, risk-based prioritization, automated patching where possible, and a coordinated vulnerability disclosure policy. The EU's vulnerability database (EUVD), managed by ENISA, adds another dimension — you'll need to cross-reference it alongside NVD.

Multi-Layer Vulnerability Scanning

A NIS2-compliant vulnerability management program scans at every layer:

• Infrastructure layer — OS vulnerabilities, kernel CVEs, misconfigurations (Nessus, Qualys, or OpenVAS)
• Container layer — Base image vulnerabilities, installed packages (Trivy, Grype, Snyk)
• Application layer — Dependency vulnerabilities, SAST/DAST (Semgrep, OWASP ZAP)
• Configuration layer — IaC misconfigurations, Kubernetes misconfigurations (Checkov, Kubeaudit, Polaris)
• Runtime layer — Runtime threat detection, anomalous behavior (Falco, Sysdig)

Risk-Based Prioritization

Not all vulnerabilities are equal. Prioritize using CVSS score + exploitability + exposure:

• Critical + exploited in wild + internet-facing → Patch within 24 hours
• Critical + exploit available + internal → Patch within 72 hours
• High + no known exploit → Patch within 7 days
• Medium/Low → Patch in next maintenance window

Use CISA's Known Exploited Vulnerabilities (KEV) catalog and EPSS scores to identify actively exploited vulnerabilities. These take priority regardless of CVSS score.

Automated Patching Pipeline

For container-based infrastructure, automate base image updates. Renovate or Dependabot creates pull requests for dependency updates. Your CI pipeline runs security scans on the updated dependencies. If tests pass and no new critical vulnerabilities are introduced, the update merges and deploys automatically. For OS-level patches, use automated node rotation — deploy a patched node image, cordon and drain the old node, verify workloads migrated successfully.

Coordinated Vulnerability Disclosure

NIS2 encourages coordinated vulnerability disclosure. Publish a security.txt file (RFC 9116) at /.well-known/security.txt. Establish a process for receiving vulnerability reports, triaging them, developing fixes, and coordinating disclosure timelines with the reporter. This isn't just good practice — it's what regulators expect from responsible entities.

What Open Empower Delivers

We implement end-to-end vulnerability management infrastructure: multi-layer scanning, risk-based prioritization, automated patching pipelines, and disclosure processes. Continuous security, not periodic compliance theater.