CVE-2009-4921 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 | 0.81% | 1.21% | +0.39% |
| 2 | 2026-02-23 | 0.43% | 0.81% | +0.38% |
| 3 | 2025-03-30 | 0.45% | 0.43% | -0.02% |
| 4 | 2025-03-29 | 0.43% | 0.45% | +0.02% |
| 5 | 2025-03-17 | 0.17% | 0.43% | +0.26% |
| 6 | 2024-09-17 | 0.12% | 0.17% | +0.05% |
| 7 | 2024-02-08 | 0.17% | 0.12% | -0.05% |
| 8 | 2023-03-07 | 1.05% | 0.17% | -0.89% |
| 9 | 2022-02-04 | — | 1.05% | — |