Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
Microsoft
Vendor reference — Microsoft · sector: Operating Systems & Platforms. Cumulative disclosure record across the archive.
Career totals
| All-time | YTD | |
|---|---|---|
| CVEs | 5776 | 4363 |
| KEV entries | 291 | 32 |
| KEV/100 | Med CVSS | Med EPSS | C | H | M | L |
|---|---|---|---|---|---|---|
| 5.0 | 7.8 | .0057 | 332 | 4028 | 1391 | 25 |
KEV/100 = KEV entries ÷ CVEs × 100. Med CVSS / Med EPSS are medians over all disclosures. C/H/M/L = disclosures by CVSS severity band.
Monthly disclosures
Trend (by first-seen month, full archive): ▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▂▁▁▁▁▁▁▁▁▁▁▁▁▁▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▂▁▁▁▁▁▂▁▁▁▁▁▁▁▁▂▁▁▂▂▂▄▃▆█
| Month | New CVEs |
|---|---|
| 2025-11 | 1 |
| 2025-12 | 1 |
| 2026-01 | 124 |
| 2026-02 | 62 |
| 2026-03 | 2 |
| 2026-04 | 184 |
| 2026-05 | 166 |
| 2026-06 | 221 |
| 2026-07 | 665 |
| 2026-08 | 477 |
| 2026-09 | 1002 |
| 2026-10 | 1460 |
Notable CVEs
Ranked by the published formula: KEV → EPSS → CVSS → CVE ID.
| CVE | CVSS | EPSS %ile | Severity | KEV | First seen |
|---|---|---|---|---|---|
| CVE-2019-0708 | 9.8 | 100.0 | CRITICAL | YES | 2019-05-16 |
| CVE-2025-53770 | 9.8 | 100.0 | CRITICAL | YES | 2025-07-20 |
| CVE-2021-34473 | 9.1 | 100.0 | CRITICAL | YES | 2021-11-03 |
| CVE-2021-26855 | 9.1 | 100.0 | CRITICAL | YES | 2021-11-03 |
| CVE-2025-49704 | 8.8 | 100.0 | HIGH | YES | 2025-07-08 |
| CVE-2021-34523 | 9.0 | 100.0 | CRITICAL | YES | 2021-11-03 |
| CVE-2023-29357 | 9.8 | 100.0 | CRITICAL | YES | 2023-06-13 |
| CVE-2025-59287 | 9.8 | 100.0 | CRITICAL | YES | 2025-10-14 |
| CVE-2022-41082 | 8.0 | 100.0 | HIGH | YES | 2022-10-03 |
| CVE-2020-0688 | 8.8 | 100.0 | HIGH | YES | 2020-02-11 |
| CVE-2022-41040 | 8.8 | 100.0 | HIGH | YES | 2022-10-03 |
| CVE-2017-11882 | 7.8 | 100.0 | HIGH | YES | 2017-11-15 |
| CVE-2021-38647 | 9.8 | 100.0 | CRITICAL | YES | 2021-11-03 |
| CVE-2019-0604 | 9.8 | 100.0 | CRITICAL | YES | 2019-03-06 |
| CVE-2021-27065 | 7.8 | 100.0 | HIGH | YES | 2021-11-03 |
Recent CVEs
| CVE | CVSS | EPSS %ile | Severity | KEV | First seen |
|---|---|---|---|---|---|
| CVE-2026-109461 | 5.9 | 26.8 | MEDIUM | — | 2026-10-16 |
| CVE-2026-80092 | 5.3 | 47.6 | MEDIUM | — | 2026-10-16 |
| CVE-2026-108452 | 8.8 | 49.4 | HIGH | — | 2026-10-15 |
| CVE-2026-108451 | 8.8 | 36.9 | HIGH | — | 2026-10-15 |
| CVE-2026-108450 | 8.8 | 36.9 | HIGH | — | 2026-10-15 |
| CVE-2026-108449 | 8.8 | 36.9 | HIGH | — | 2026-10-15 |
| CVE-2026-108448 | 7.5 | 26.8 | HIGH | — | 2026-10-15 |
| CVE-2026-108447 | 8.8 | 36.9 | HIGH | — | 2026-10-15 |
| CVE-2026-108446 | 8.8 | 36.9 | HIGH | — | 2026-10-15 |
| CVE-2026-108445 | 8.8 | 36.9 | HIGH | — | 2026-10-15 |
| CVE-2026-108444 | 8.8 | 36.9 | HIGH | — | 2026-10-15 |
| CVE-2026-108443 | 8.8 | 36.9 | HIGH | — | 2026-10-15 |
| CVE-2026-108442 | 8.8 | 36.9 | HIGH | — | 2026-10-15 |
| CVE-2026-108441 | 8.8 | 36.9 | HIGH | — | 2026-10-15 |
| CVE-2026-108440 | 8.8 | 36.9 | HIGH | — | 2026-10-15 |
Products
This vendor's products with a reference page (≥2 disclosures), by CVE count. A monolithic vendor total dilutes signal; product pages sharpen it.
KEV entries
| CVE | KEV added | CVSS | EPSS %ile | Severity |
|---|---|---|---|---|
| CVE-2026-96951 | 2026-10-13 | 8.8 | 74.1 | HIGH |
| CVE-2026-65660 | 2026-09-25 | 8.8 | 81.4 | HIGH |
| CVE-2026-85880 | 2026-09-08 | 7.8 | 89.4 | HIGH |
| CVE-2026-81963 | 2026-09-08 | 7.8 | 31.9 | HIGH |
| CVE-2019-1068 | 2026-08-26 | 8.8 | 99.1 | HIGH |
| CVE-2026-33824 | 2026-08-18 | 9.8 | 75.7 | CRITICAL |
| CVE-2026-55040 | 2026-08-18 | 9.1 | 99.4 | CRITICAL |
| CVE-2026-68820 | 2026-08-11 | 7.0 | 24.8 | HIGH |
| CVE-2026-50522 | 2026-07-22 | 9.8 | 87.3 | CRITICAL |
| CVE-2026-58644 | 2026-07-16 | 9.8 | 96.9 | CRITICAL |
| CVE-2026-56164 | 2026-07-14 | 9.8 | 62.5 | CRITICAL |
| CVE-2026-56155 | 2026-07-14 | 7.8 | 26.6 | HIGH |
| CVE-2026-45659 | 2026-07-01 | 8.8 | 85.7 | HIGH |
| CVE-2026-45498 | 2026-05-20 | 7.5 | 69.3 | HIGH |
| CVE-2026-41091 | 2026-05-20 | 7.8 | 37.1 | HIGH |
| CVE-2026-42897 | 2026-05-15 | 8.1 | 42.9 | HIGH |
| CVE-2026-32202 | 2026-04-28 | 4.3 | 92.0 | MEDIUM |
| CVE-2026-33825 | 2026-04-22 | 7.8 | 32.6 | HIGH |
| CVE-2026-32201 | 2026-04-14 | 6.5 | 98.7 | MEDIUM |
| CVE-2023-21529 | 2026-04-13 | 8.8 | 99.1 | HIGH |
| CVE-2023-36424 | 2026-04-13 | 7.8 | 96.1 | HIGH |
| CVE-2025-60710 | 2026-04-13 | 7.8 | 91.6 | HIGH |
| CVE-2026-20963 | 2026-03-18 | 9.8 | 98.2 | CRITICAL |
| CVE-2024-43468 | 2026-02-12 | 9.8 | 99.6 | CRITICAL |
| CVE-2026-21533 | 2026-02-10 | 7.8 | 90.7 | HIGH |
KEV timing
| CVE | Days |
|---|---|
| CVE-2017-0144 | 0 |
| CVE-2017-0145 | 0 |
| CVE-2018-8120 | 0 |
| CVE-2018-8174 | 0 |
| CVE-2018-8453 | 0 |
| CVE-2019-0752 | 0 |
| CVE-2019-1069 | 0 |
| CVE-2019-1130 | 0 |
| CVE-2019-1385 | 0 |
| CVE-2019-1405 | 0 |
| CVE | Due | Days over |
|---|---|---|
| CVE-2021-33771 | 2021-11-17 | 1797 |
| CVE-2021-34448 | 2021-11-17 | 1797 |
| CVE-2021-34473 | 2021-11-17 | 1797 |
| CVE-2021-34523 | 2021-11-17 | 1797 |
| CVE-2021-36942 | 2021-11-17 | 1797 |
| CVE-2021-36948 | 2021-11-17 | 1797 |
| CVE-2021-36955 | 2021-11-17 | 1797 |
| CVE-2021-38645 | 2021-11-17 | 1797 |
| CVE-2021-38647 | 2021-11-17 | 1797 |
| CVE-2021-38648 | 2021-11-17 | 1797 |
Methodology
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.
