EPSS score history for CVE-2021-27556, 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 | 2026-06-24 | 3.88% | 4.01% | +0.13% |
| 2 | 2026-06-15 | 7.13% | 3.88% | -3.25% |
| 3 | 2025-11-21 | 9.12% | 7.13% | -1.99% |
| 4 | 2025-11-18 | 7.13% | 9.12% | +1.99% |
| 5 | 2025-09-11 | 9.12% | 7.13% | -1.99% |
| 6 | 2025-03-30 | 9.98% | 9.12% | -0.86% |
| 7 | 2025-03-29 | 9.12% | 9.98% | +0.86% |
| 8 | 2025-03-17 | 0.35% | 9.12% | +8.77% |
| 9 | 2024-12-17 | 0.29% | 0.35% | +0.06% |
| 10 | 2023-03-07 | 1.16% | 0.29% | -0.87% |
| 11 | 2022-04-01 | 15.36% | 1.16% | -14.21% |
| 12 | 2022-02-04 | 3.99% | 15.36% | +11.37% |
| 13 | 2022-01-06 | 0.92% | 3.99% | +3.07% |
| 14 | 2021-10-10 | 3.99% | 0.92% | -3.07% |
| 15 | 2021-09-04 | 0.92% | 3.99% | +3.07% |
| 16 | 2021-08-31 | — | 0.92% | — |