CVE-2009-1821 的 EPSS 分數歷史，展示風險變化與利用機率趨勢，支援漏洞優先級與安全分析。
| # | 日期 | 舊 EPSS 分數 | 新 EPSS 分數 | 變化（新 − 舊） |
|---|---|---|---|---|
| 1 | 2026-06-15 | 5.37% | 2.62% | -2.75% |
| 2 | 2026-05-29 | 5.23% | 5.37% | +0.13% |
| 3 | 2025-08-23 | 2.51% | 5.23% | +2.72% |
| 4 | 2025-03-30 | 6.10% | 2.51% | -3.59% |
| 5 | 2025-03-29 | 2.51% | 6.10% | +3.59% |
| 6 | 2025-03-17 | 0.64% | 2.51% | +1.87% |
| 7 | 2024-05-05 | 0.49% | 0.64% | +0.15% |
| 8 | 2024-01-07 | 0.35% | 0.49% | +0.14% |
| 9 | 2023-10-16 | 0.32% | 0.35% | +0.04% |
| 10 | 2023-03-07 | 4.19% | 0.32% | -3.87% |
| 11 | 2022-02-04 | — | 4.19% | — |