EPSS score history for CVE-2021-4455, showing historical risk changes and exploitation probability trends for vulnerability prioritization and security analysis.
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-03 | 1.60% | 0.57% | -1.03% |
| 2 | 2026-05-28 | 1.05% | 1.60% | +0.55% |
| 3 | 2026-05-27 | 2.09% | 1.05% | -1.04% |
| 4 | 2026-02-13 | 1.05% | 2.09% | +1.03% |
| 5 | 2026-01-03 | 0.86% | 1.05% | +0.19% |
| 6 | 2025-12-23 | 0.79% | 0.86% | +0.08% |
| 7 | 2025-11-23 | 0.58% | 0.79% | +0.21% |
| 8 | 2025-11-21 | 0.52% | 0.58% | +0.06% |
| 9 | 2025-11-18 | 0.58% | 0.52% | -0.06% |
| 10 | 2025-11-13 | 0.46% | 0.58% | +0.12% |
| 11 | 2025-09-27 | 0.39% | 0.46% | +0.07% |
| 12 | 2025-09-16 | 0.26% | 0.39% | +0.12% |
| 13 | 2025-08-19 | 0.15% | 0.26% | +0.11% |
| 14 | 2025-04-20 | 0.15% | 0.15% | +0.00% |
| 15 | 2025-04-19 | — | 0.15% | — |