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 — Microsoft Office LTSC 2021 by Microsoft · sector: Operating Systems & Platforms. Cumulative disclosure record for this product across the archive.
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| All-time | YTD | |
|---|---|---|
| CVEs | 284 | 232 |
| KEV entries | 5 | 2 |
| KEV/100 | Med CVSS | Med EPSS | C | H | M | L |
|---|---|---|---|---|---|---|
| 1.8 | 7.8 | .0037 | 2 | 204 | 71 | 7 |
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 | 10 |
| 2026-02 | 6 |
| 2026-03 | 0 |
| 2026-04 | 10 |
| 2026-05 | 16 |
| 2026-06 | 24 |
| 2026-07 | 76 |
| 2026-08 | 90 |
Ranked by the published formula: KEV → EPSS → CVSS → CVE ID.
| CVE | CVSS | EPSS %ile | Severity | KEV | First seen |
|---|---|---|---|---|---|
| CVE-2024-21413 | 9.8 | 99.9 | CRITICAL | YES | 2025-02-06 |
| CVE-2026-21509 | 7.8 | 99.4 | HIGH | YES | 2026-01-26 |
| CVE-2021-42292 | 7.8 | 98.2 | HIGH | YES | 2021-11-17 |
| CVE-2024-38226 | 7.3 | 84.5 | HIGH | YES | 2024-09-10 |
| CVE-2026-21514 | 7.8 | 72.5 | HIGH | YES | 2026-02-10 |
| CVE-2023-21716 | 9.8 | 99.6 | CRITICAL | — | 2023-02-14 |
| CVE-2024-21378 | 8.8 | 95.5 | HIGH | — | 2024-02-13 |
| CVE-2024-43504 | 7.8 | 93.1 | HIGH | — | 2024-10-08 |
| CVE-2026-40364 | 8.4 | 90.6 | HIGH | — | 2026-05-12 |
| CVE-2026-21511 | 7.5 | 88.6 | HIGH | — | 2026-02-10 |
| CVE-2021-41368 | 6.1 | 88.3 | MEDIUM | — | 2021-11-10 |
| CVE-2024-30103 | 8.8 | 88.0 | HIGH | — | 2024-06-11 |
| CVE-2025-27751 | 7.8 | 82.5 | HIGH | — | 2025-04-08 |
| CVE-2022-41106 | 8.8 | 81.5 | HIGH | — | 2022-11-09 |
| CVE-2023-36893 | 6.5 | 81.0 | MEDIUM | — | 2023-08-08 |
| CVE | CVSS | EPSS %ile | Severity | KEV | First seen |
|---|---|---|---|---|---|
| CVE-2026-70322 | 5.5 | 30.8 | MEDIUM | — | 2026-08-11 |
| CVE-2026-70328 | 6.5 | 55.4 | MEDIUM | — | 2026-08-11 |
| CVE-2026-70329 | 8.8 | 47.8 | HIGH | — | 2026-08-11 |
| CVE-2026-70327 | 6.5 | 55.4 | MEDIUM | — | 2026-08-11 |
| CVE-2026-70325 | 5.5 | 30.8 | MEDIUM | — | 2026-08-11 |
| CVE-2026-70323 | 5.5 | 30.8 | MEDIUM | — | 2026-08-11 |
| CVE-2026-70318 | 5.5 | 29.3 | MEDIUM | — | 2026-08-11 |
| CVE-2026-70316 | 5.5 | 30.8 | MEDIUM | — | 2026-08-11 |
| CVE-2026-70320 | 5.5 | 30.8 | MEDIUM | — | 2026-08-11 |
| CVE-2026-70313 | 7.8 | 25.5 | HIGH | — | 2026-08-11 |
| CVE-2026-70314 | 5.5 | 38.7 | MEDIUM | — | 2026-08-11 |
| CVE-2026-70317 | 5.5 | 29.2 | MEDIUM | — | 2026-08-11 |
| CVE-2026-70315 | 5.5 | 30.8 | MEDIUM | — | 2026-08-11 |
| CVE-2026-70319 | 5.5 | 30.8 | MEDIUM | — | 2026-08-11 |
| CVE-2026-70310 | 5.5 | 20.2 | MEDIUM | — | 2026-08-11 |
| CVE | KEV added | CVSS | EPSS %ile | Severity |
|---|---|---|---|---|
| CVE-2026-21514 | 2026-02-10 | 7.8 | 72.5 | HIGH |
| CVE-2026-21509 | 2026-01-26 | 7.8 | 99.4 | HIGH |
| CVE-2024-21413 | 2025-02-06 | 9.8 | 99.9 | CRITICAL |
| CVE-2024-38226 | 2024-09-10 | 7.3 | 84.5 | HIGH |
| CVE-2021-42292 | 2021-11-17 | 7.8 | 98.2 | 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.