Complete Guide to Vulnerability Management for Modern Businesses
How Often Should You Run Vulnerability Scans?
Organizations should run vulnerability scans continuously for production infrastructure. At minimum, compliance frameworks like PCI DSS require quarterly external scans and regular internal scans. Continuous scanning is the gold standard for modern cloud and hybrid environments.
Andreas Johansson · Chief Executive Officer
Senior IT management leader with 25 years of experience in Cloud, Security, and Datacenter infrastructure.
Why Scanning Frequency Matters
The window between when a vulnerability is introduced and when it's detected is your exposure window. Every day a critical vulnerability goes undetected is a day an attacker could exploit it. Scanning frequency directly controls the size of this window.
Consider: the average time-to-exploit for critical vulnerabilities has dropped from weeks to days. If you scan quarterly, a vulnerability introduced the day after a scan could go undetected for nearly three months. Continuous scanning reduces this exposure window to minutes or hours.
Compliance-Driven Scanning Requirements
Several compliance frameworks specify minimum scanning frequencies:
- PCI DSS requires quarterly external vulnerability scans by an Approved Scanning Vendor (ASV) and regular internal scans. After significant changes, additional scans are required.
- SOC 2 expects regular vulnerability scanning as part of the CC7.1 control, though it doesn't prescribe a specific frequency. Most auditors expect at least quarterly scanning.
- NIST 800-53 recommends continuous monitoring as part of the RA-5 control family, with scan frequency based on risk categorization.
- NIS2 Directive requires organizations to implement appropriate technical measures for vulnerability handling, with many member states interpreting this as requiring continuous or at least monthly scanning.
These are minimums. Meeting compliance requirements doesn't necessarily mean you're secure — it means you've met the regulatory floor.
Recommended Scanning Cadences
- Production cloud infrastructure: Continuous. Cloud environments change constantly. New resources are provisioned, configurations are modified, and deployments happen multiple times per day. Continuous scanning is the only approach that keeps pace.
- Production servers: Continuous or daily. Server configurations are more stable than cloud environments but still change through patches, deployments, and administrative actions. Continuous agent-based monitoring is ideal; daily scans are the minimum.
- Development and staging environments: Weekly. While not production, development environments often mirror production architectures and can expose secrets, credentials, or misconfigurations that attackers target.
- External perimeter: Continuous plus quarterly ASV. Your internet-facing surface should be monitored continuously. Quarterly ASV scans satisfy PCI DSS requirements and provide independent validation.
Factors That Increase Frequency Needs
Several factors should push you toward more frequent scanning:
- High rate of infrastructure change — Frequent deployments and scaling events
- Regulated industry — Healthcare, financial services, critical infrastructure
- Internet-facing services — Publicly accessible applications and APIs
- History of incidents — Previous breaches indicate higher targeting risk
- Sensitive data handling — PII, financial data, health records
Moving from Periodic to Continuous
Transitioning from quarterly or monthly scans to continuous monitoring is a strategic shift. It requires tools that operate without manual intervention, integrate with existing workflows, and produce actionable output rather than overwhelming noise.
How SeqOps fits
SeqOps scans your AWS, Azure and Google Cloud accounts and your Windows and Linux servers automatically, ranks every finding from Critical to Informational and explains how to fix it. It covers the scanning and prioritisation steps of the lifecycle; your team or your MSP does the remediation.