Multi-tier vulnerability trending architecture aggregates external feeds into time-series data for bar graph visualization. External vulnerability feeds flow through a Data Aggregation Service via scheduled ingestion into the Vulnerability Database. The API Gateway routes analyst requests through a Cache Layer to the Vulnerability Data Service, which queries trend data and passes it to the Chart Rendering Engine. Security teams use this pattern to visualize vulnerability counts over time, enabling data-driven prioritization and SLA tracking. Fork this diagram on Diagrams.so to customize data sources, add severity breakdowns, or integrate with your SIEM.