EPSS score history for CVE-2021-1721, 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 | 2026-06-18 | 3.37% | 3.34% | -0.03% |
| 2 | 2026-06-15 | 9.34% | 3.37% | -5.97% |
| 3 | 2026-01-16 | 7.10% | 9.34% | +2.24% |
| 4 | 2025-11-21 | 10.49% | 7.10% | -3.39% |
| 5 | 2025-11-18 | 7.10% | 10.49% | +3.39% |
| 6 | 2025-11-10 | 7.04% | 7.10% | +0.06% |
| 7 | 2025-07-19 | 4.77% | 7.04% | +2.27% |
| 8 | 2025-03-30 | 9.37% | 4.77% | -4.60% |
| 9 | 2025-03-29 | 4.77% | 9.37% | +4.60% |
| 10 | 2025-03-25 | 5.21% | 4.77% | -0.44% |
| 11 | 2025-03-19 | 6.58% | 5.21% | -1.37% |
| 12 | 2025-03-17 | 0.29% | 6.58% | +6.29% |
| 13 | 2024-09-22 | 0.17% | 0.29% | +0.12% |
| 14 | 2023-09-06 | 0.12% | 0.17% | +0.05% |
| 15 | 2023-05-20 | 0.18% | 0.12% | -0.06% |
| 16 | 2023-04-07 | 0.15% | 0.18% | +0.03% |
| 17 | 2023-03-12 | 0.15% | 0.15% | +0.00% |
| 18 | 2023-03-11 | 0.20% | 0.15% | -0.05% |
| 19 | 2023-03-07 | 2.63% | 0.20% | -2.43% |
| 20 | 2022-09-13 | 2.43% | 2.63% | +0.20% |
| 21 | 2022-05-16 | 2.25% | 2.43% | +0.18% |
| 22 | 2022-04-01 | 9.13% | 2.25% | -6.88% |
| 23 | 2022-02-04 | 21.08% | 9.13% | -11.95% |
| 24 | 2022-01-06 | 5.62% | 21.08% | +15.46% |
| 25 | 2021-04-14 | — | 5.62% | — |