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.
Vendor reference — Microsoft · sector: Operating Systems & Platforms. Cumulative disclosure record across the archive.
| All-time | YTD | |
|---|---|---|
| CVEs | 3354 | 1875 |
| KEV entries | 380 | 35 |
| KEV/100 | Med CVSS | Med EPSS | C | H | M | L |
|---|---|---|---|---|---|---|
| 11.3 | 7.8 | .0070 | 182 | 2114 | 747 | 22 |
KEV/100 = KEV entries ÷ CVEs × 100. Med CVSS / Med EPSS are medians over all 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 | 8 |
| 2025-11 | 1 |
| 2025-12 | 1 |
| 2026-01 | 124 |
| 2026-02 | 63 |
| 2026-03 | 1 |
| 2026-04 | 187 |
| 2026-05 | 170 |
| 2026-06 | 221 |
| 2026-07 | 665 |
| 2026-08 | 444 |
Ranked by the published formula: KEV → EPSS → CVSS → CVE ID.
| CVE | CVSS | EPSS %ile | Severity | KEV | First seen |
|---|---|---|---|---|---|
| CVE-2021-26855 | 9.1 | 100.0 | CRITICAL | YES | 2021-11-03 |
| CVE-2021-34473 | 9.1 | 100.0 | CRITICAL | YES | 2021-11-03 |
| CVE-2015-1635 | — | 100.0 | — | YES | 2022-02-10 |
| CVE-2019-0708 | — | 100.0 | — | YES | 2021-11-03 |
| CVE-2021-34523 | 9.0 | 100.0 | CRITICAL | YES | 2021-11-03 |
| CVE-2025-49704 | — | 100.0 | — | YES | 2025-07-22 |
| CVE-2025-53770 | 9.8 | 100.0 | CRITICAL | YES | 2025-07-20 |
| CVE-2012-0158 | — | 100.0 | — | YES | 2021-11-03 |
| CVE-2022-41082 | — | 100.0 | — | YES | 2022-09-30 |
| CVE-2020-0688 | — | 100.0 | — | YES | 2021-11-03 |
| CVE-2022-41040 | — | 100.0 | — | YES | 2022-09-30 |
| CVE-2021-27065 | 7.8 | 100.0 | HIGH | YES | 2021-11-03 |
| CVE-2017-11882 | — | 100.0 | — | YES | 2021-11-03 |
| CVE-2025-59287 | — | 100.0 | — | YES | 2025-10-24 |
| CVE-2021-38647 | 9.8 | 100.0 | CRITICAL | YES | 2021-11-03 |
| CVE | CVSS | EPSS %ile | Severity | KEV | First seen |
|---|---|---|---|---|---|
| CVE-2026-24301 | 8.8 | 74.3 | HIGH | — | 2026-08-18 |
| CVE-2026-73851 | 6.1 | 71.8 | MEDIUM | — | 2026-08-17 |
| CVE-2026-72970 | 8.3 | 40.8 | HIGH | — | 2026-08-14 |
| CVE-2026-69414 | 7.8 | 13.7 | HIGH | — | 2026-08-14 |
| CVE-2026-50523 | 7.8 | 12.3 | HIGH | — | 2026-08-14 |
| CVE-2026-73296 | 9.4 | 84.2 | CRITICAL | — | 2026-08-12 |
| CVE-2026-73297 | 6.9 | 74.1 | MEDIUM | — | 2026-08-12 |
| CVE-2026-73299 | 10.0 | 66.1 | CRITICAL | — | 2026-08-12 |
| CVE-2026-73298 | 8.7 | 49.5 | HIGH | — | 2026-08-12 |
| CVE-2026-72971 | 5.5 | 28.9 | MEDIUM | — | 2026-08-11 |
| CVE-2026-71331 | 8.1 | 37.2 | HIGH | — | 2026-08-11 |
| CVE-2026-70355 | 8.7 | 38.4 | HIGH | — | 2026-08-11 |
| CVE-2026-70354 | 7.8 | 22.0 | HIGH | — | 2026-08-11 |
| CVE-2026-70348 | 5.5 | 35.6 | MEDIUM | — | 2026-08-11 |
| CVE-2026-70346 | 7.8 | 23.9 | HIGH | — | 2026-08-11 |
This vendor's products with a reference page (≥2 disclosures), by CVE count. A monolithic vendor total dilutes signal; product pages sharpen it.
| CVE | KEV added | CVSS | EPSS %ile | Severity |
|---|---|---|---|---|
| CVE-2026-33824 | 2026-08-18 | 9.8 | 99.5 | CRITICAL |
| CVE-2026-55040 | 2026-08-18 | 9.1 | 92.1 | CRITICAL |
| CVE-2026-68820 | 2026-08-11 | 7.0 | 26.2 | HIGH |
| CVE-2026-50522 | 2026-07-22 | 9.8 | 99.5 | CRITICAL |
| CVE-2026-58644 | 2026-07-16 | 9.8 | 98.7 | CRITICAL |
| CVE-2026-56164 | 2026-07-14 | 9.8 | 97.5 | CRITICAL |
| CVE-2026-56155 | 2026-07-14 | 7.8 | 82.2 | HIGH |
| CVE-2026-45659 | 2026-07-01 | 8.8 | 95.2 | HIGH |
| CVE-2026-45498 | 2026-05-20 | 7.5 | 99.1 | HIGH |
| CVE-2026-41091 | 2026-05-20 | 7.8 | 95.1 | HIGH |
| CVE-2010-0806 | 2026-05-20 | — | 99.6 | — |
| CVE-2010-0249 | 2026-05-20 | — | 99.8 | — |
| CVE-2009-1537 | 2026-05-20 | — | 98.8 | — |
| CVE-2008-4250 | 2026-05-20 | — | 99.9 | — |
| CVE-2026-42897 | 2026-05-15 | 8.1 | 99.3 | HIGH |
| CVE-2026-32202 | 2026-04-28 | 4.3 | 99.2 | MEDIUM |
| CVE-2026-33825 | 2026-04-22 | 7.8 | 93.4 | HIGH |
| CVE-2026-32201 | 2026-04-14 | 6.5 | 97.5 | MEDIUM |
| CVE-2009-0238 | 2026-04-14 | — | 98.6 | — |
| CVE-2023-21529 | 2026-04-13 | 8.8 | 99.1 | HIGH |
| CVE-2025-60710 | 2026-04-13 | 7.8 | 90.9 | HIGH |
| CVE-2023-36424 | 2026-04-13 | — | 95.8 | — |
| CVE-2012-1854 | 2026-04-13 | — | 97.4 | — |
| CVE-2026-20963 | 2026-03-18 | 9.8 | 98.1 | CRITICAL |
| CVE-2008-0015 | 2026-02-17 | — | 99.5 | — |
| CVE | Days |
|---|---|
| CVE-2002-0367 | 0 |
| CVE-2004-0210 | 0 |
| CVE-2006-2492 | 0 |
| CVE-2007-0671 | 0 |
| CVE-2008-0015 | 0 |
| CVE-2008-4250 | 0 |
| CVE-2009-0238 | 0 |
| CVE-2009-0556 | 0 |
| CVE-2009-0557 | 0 |
| CVE-2009-0563 | 0 |
| CVE | Due | Days over |
|---|---|---|
| CVE-2021-31955 | 2021-11-17 | 1736 |
| CVE-2021-1647 | 2021-11-17 | 1736 |
| CVE-2021-33739 | 2021-11-17 | 1736 |
| CVE-2021-33742 | 2021-11-17 | 1736 |
| CVE-2021-31199 | 2021-11-17 | 1736 |
| CVE-2021-31956 | 2021-11-17 | 1736 |
| CVE-2021-31201 | 2021-11-17 | 1736 |
| CVE-2021-31207 | 2021-11-17 | 1736 |
| CVE-2021-28310 | 2021-11-17 | 1736 |
| CVE-2021-31979 | 2021-11-17 | 1736 |
Rate statistics are arithmetic over published figures: KEV/100 = KEV entries ÷ CVEs × 100; medians are taken over this vendor's disclosures. Vendor names are normalized (case, punctuation, common aliases) before aggregation; monthly counts are keyed to first-seen day, the day this archive first observed the record, not the upstream publication date.
Raw counts are not comparable across vendors: disclosure practices, product breadth, and CNA conventions differ widely, so a larger number here does not mean less secure software. This is a reference page assembled from the public record — not a record of its own, and not a ranking of vendors by our judgment.
Sources. CVE records from the CVE Program (cvelistV5); enrichment from NVD (NIST); known-exploited status from the CISA KEV catalog; exploit probability from FIRST EPSS.