Vulnerability management has become one of the top priorities for IT teams and security officers. With more than 25,000 CVEs published every year by NIST, identifying which ones actually affect your infrastructure is a serious challenge. This guide walks you through structuring an effective CVE monitoring program.
Why Monitor CVEs Across Your Assets?
An unpatched CVE is an open door for attackers. The numbers speak for themselves: according to Verizon, 60% of data breaches exploit known vulnerabilities for which a patch already existed. The problem isn't a lack of patches — it's the delay between a CVE being published and the patch being applied.
That average delay is 60 to 150 days in large organizations. Attackers, on the other hand, begin exploiting newly published CVEs within hours.
The 3 Key Steps of Effective CVE Monitoring
1. Build an Accurate Asset Inventory
You cannot monitor what you don't know. The first step is compiling a precise inventory of your assets:
- Software: operating systems, business applications, open-source libraries
- Network equipment: firewalls, switches, routers, VPN gateways
- Servers: exact OS versions, middlewares, databases
- Industrial devices (OT/ICS): firmware, versions
The key tool here is CPE (Common Platform Enumeration), a standardized format that precisely identifies each piece of software or hardware. For example: cpe:2.3:a:apache:http_server:2.4.51:*:*:*:*:*:*:*. CVEs published by the NVD reference these CPEs, enabling automatic matching.
2. Map Your Inventory to Published CVEs
Once your inventory is in place, you need to cross-reference it with the NVD (National Vulnerability Database). Several approaches exist:
Manual approach: regularly checking nvd.nist.gov for each product in your fleet. Time-consuming and not scalable beyond 10 products.
Automated approach: using a CVE monitoring platform that maintains this mapping continuously. You define your assets once, and the platform alerts you whenever a new CVE is published for one of them.
Hybrid approach: combining network scanning tools (Nessus, OpenVAS) for asset discovery, and a monitoring platform for alerts.
3. Prioritize and Remediate
Not all CVEs are created equal. A CRITICAL CVE with a CVSS score of 9.8 on an internet-facing server is not the same priority as a MEDIUM CVE on an isolated workstation.
Prioritization criteria:
| Criteria | Priority impact |
|---|---|
| CVSS ≥ 9.0 (CRITICAL) | Immediate remediation (< 24h) |
| Public exploit available | Maximum priority |
| Internet-facing asset | High priority |
| Sensitive data involved | High priority |
| CVSS 7.0-8.9 (HIGH) | Remediate within 7 days |
| CVSS < 7.0 | Next maintenance window |
Tools to Track CVEs Across Your Assets
Open-Source Solutions
- OpenVAS / Greenbone: open-source vulnerability scanner, powerful but complex to maintain
- MITRE CVE: the official source, API available but no asset management interface
- NVD API: direct access to NIST data, requires custom development
Commercial Platforms
- Qualys VMDR: complete enterprise solution, expensive
- Tenable.io: market leader, per-asset pricing
- Rapid7 InsightVM: strong DevOps integrations
- cveo.tech: French SaaS solution, starting at €9.99/month, automatic email alerts and asset management
What to Look for in a Tool
Whatever tool you choose, it should offer:
- Real-time alerts: notification as soon as a CVE affecting your assets is published
- Severity filtering: so you're not overwhelmed by low-criticality CVEs
- Deduplication: an already-handled CVE should not trigger new alerts
- History: traceability of vulnerabilities and remediation actions
- Reports: for audits and management reporting
Best Practices for IT Teams
Establish a Patch Management Process
CVE monitoring is only valuable if paired with a remediation process. Define:
- SLAs by severity: CRITICAL < 24h, HIGH < 7 days, MEDIUM < 30 days
- Maintenance windows: for critical systems, schedule regular patching slots
- Validation process: test patches in a staging environment before production
Automate Information Collection
Don't wait to be impacted before staying informed. Configure:
- Automatic email alerts for CRITICAL and HIGH CVEs
- A tracking dashboard for management
- Integrations with your SIEM or ITSM tool (Jira, ServiceNow)
Train Your Teams
CVE monitoring involves multiple stakeholders:
- Systems/network team: patch application
- Developers: open-source library vulnerabilities
- CISO: arbitration and prioritization
- Management: budget validation and strategic decisions
The Special Case of Open-Source Software
Open-source libraries (npm, pip, Maven, NuGet) now account for over 70% of code in modern applications. Tracking them is different because:
- Versions change very frequently
- CVEs often affect specific versions only
- Transitive dependencies are difficult to inventory
Specialized tools like Snyk, OWASP Dependency-Check, or GitHub Dependabot are recommended for this layer.
Conclusion: An Ongoing Process, Not a One-Time Project
Monitoring CVEs across your assets is not a project you launch once and forget. It's a continuous discipline that evolves with your infrastructure.
The most mature organizations treat vulnerability management as an operational process on par with performance monitoring or data backup.
Where to start?
- Build an inventory of your 10–20 most critical assets
- Set up automatic CVE alerts for those assets
- Define your remediation SLAs
- Measure and improve continuously
With cveo.tech, you can get started in under 10 minutes: create your account, add your equipment, and receive your first CVE alerts from the next scan.