Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
Product reference — Windows Server, Version 1909 (Server Core Installation) by Microsoft · sector: Operating Systems & Platforms. Cumulative disclosure record for this product across the archive.
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| All-time | YTD | |
|---|---|---|
| CVEs | 128 | 0 |
| KEV entries | 5 | 0 |
| KEV/100 | Med CVSS | Med EPSS | C | H | M | L |
|---|---|---|---|---|---|---|
| 3.9 | 7.8 | .0106 | 7 | 101 | 19 | 0 |
KEV/100 = KEV entries ÷ CVEs × 100. Med CVSS / Med EPSS are medians over this product's disclosures. C/H/M/L = disclosures by CVSS severity band.
Trend (by first-seen month, full archive): █▁▁▁▁▁▁▁▁▁▅▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁
| Month | New CVEs |
|---|---|
| 2025-09 | 0 |
| 2025-10 | 0 |
| 2025-11 | 0 |
| 2025-12 | 0 |
| 2026-01 | 0 |
| 2026-02 | 0 |
| 2026-03 | 0 |
| 2026-04 | 0 |
| 2026-05 | 0 |
| 2026-06 | 0 |
| 2026-07 | 0 |
| 2026-08 | 0 |
Ranked by the published formula: KEV → EPSS → CVSS → CVE ID.
| CVE | CVSS | EPSS %ile | Severity | KEV | First seen |
|---|---|---|---|---|---|
| CVE-2020-0796 | 10.0 | 100.0 | CRITICAL | YES | 2022-02-10 |
| CVE-2021-1732 | 7.8 | 99.5 | HIGH | YES | 2021-11-03 |
| CVE-2020-1054 | 7.0 | 98.9 | HIGH | YES | 2021-11-03 |
| CVE-2020-0787 | 7.8 | 98.6 | HIGH | YES | 2022-01-28 |
| CVE-2020-0638 | 7.8 | 86.5 | HIGH | YES | 2022-05-23 |
| CVE-2021-26877 | 9.8 | 97.1 | CRITICAL | — | 2021-03-11 |
| CVE-2020-1118 | 8.6 | 96.9 | HIGH | — | 2020-05-21 |
| CVE-2020-1048 | 7.8 | 96.7 | HIGH | — | 2020-05-21 |
| CVE-2021-26897 | 9.8 | 96.2 | CRITICAL | — | 2021-03-11 |
| CVE-2021-26863 | 7.0 | 95.8 | HIGH | — | 2021-03-11 |
| CVE-2020-1153 | 7.8 | 95.7 | HIGH | — | 2020-05-21 |
| CVE-2020-1117 | 8.8 | 95.6 | HIGH | — | 2020-05-21 |
| CVE-2020-1051 | 7.8 | 95.5 | HIGH | — | 2020-05-21 |
| CVE-2020-1174 | 7.8 | 95.5 | HIGH | — | 2020-05-21 |
| CVE-2020-1175 | 7.8 | 95.5 | HIGH | — | 2020-05-21 |
| CVE | CVSS | EPSS %ile | Severity | KEV | First seen |
|---|---|---|---|---|---|
| CVE-2020-0638 | 7.8 | 86.5 | HIGH | YES | 2022-05-23 |
| CVE-2020-0796 | 10.0 | 100.0 | CRITICAL | YES | 2022-02-10 |
| CVE-2020-0787 | 7.8 | 98.6 | HIGH | YES | 2022-01-28 |
| CVE-2020-1054 | 7.0 | 98.9 | HIGH | YES | 2021-11-03 |
| CVE-2021-1732 | 7.8 | 99.5 | HIGH | YES | 2021-11-03 |
| CVE-2021-33760 | 5.5 | 59.3 | MEDIUM | — | 2021-07-14 |
| CVE-2021-27077 | 7.8 | 71.1 | HIGH | — | 2021-03-11 |
| CVE-2021-27063 | 7.5 | 92.4 | HIGH | — | 2021-03-11 |
| CVE-2021-26901 | 7.8 | 49.6 | HIGH | — | 2021-03-11 |
| CVE-2021-26900 | 7.8 | 82.4 | HIGH | — | 2021-03-11 |
| CVE-2021-26895 | 9.8 | 93.4 | CRITICAL | — | 2021-03-11 |
| CVE-2021-26899 | 7.8 | 55.7 | HIGH | — | 2021-03-11 |
| CVE-2021-26898 | 7.8 | 53.0 | HIGH | — | 2021-03-11 |
| CVE-2021-26896 | 7.5 | 93.4 | HIGH | — | 2021-03-11 |
| CVE-2021-26892 | 6.2 | 61.9 | MEDIUM | — | 2021-03-11 |
| CVE | KEV added | CVSS | EPSS %ile | Severity |
|---|---|---|---|---|
| CVE-2020-0638 | 2022-05-23 | 7.8 | 86.5 | HIGH |
| CVE-2020-0796 | 2022-02-10 | 10.0 | 100.0 | CRITICAL |
| CVE-2020-0787 | 2022-01-28 | 7.8 | 98.6 | HIGH |
| CVE-2020-1054 | 2021-11-03 | 7.0 | 98.9 | HIGH |
| CVE-2021-1732 | 2021-11-03 | 7.8 | 99.5 | HIGH |
Vendor: Microsoft — all products and the full vendor record.
A product is a (vendor, product) pair as named in the affected-product data. Rate statistics are arithmetic over published figures. Counts key to first-seen day. Raw counts are not comparable across products; this is a reference page assembled from the public record, not a ranking by our judgment.
Sources. CVE Program (cvelistV5), NVD (NIST), CISA KEV, FIRST EPSS.