boxscore/security
PRODUCT · referenceProducts · latest edition

Reference page — cumulative record through Wednesday, October 7, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

Microsoft Office LTSC 2021

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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Product totals

Disclosures & known-exploited
All-timeYTD
CVEs396340
KEV entries92
Rate & severity
KEV/100Med CVSSMed EPSSCHML
2.37.8.005442691167

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.

Monthly disclosures

Trend (by first-seen month, full archive): ▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▂▁▁▁▁▁▁▁▁▂▁▁▂▂▃▆▇█▁

Last 12 months (new CVEs by first-seen day)
MonthNew CVEs
2025-110
2025-120
2026-0110
2026-026
2026-030
2026-0410
2026-0516
2026-0624
2026-0776
2026-0891
2026-09107
2026-100

Notable CVEs

Ranked by the published formula: KEV → EPSS → CVSS → CVE ID.

Notable (ranked)
CVECVSSEPSS %ileSeverityKEVFirst seen
CVE-2023-233979.899.9CRITICALYES2023-03-14
CVE-2024-214139.899.9CRITICALYES2025-02-06
CVE-2026-215097.899.4HIGHYES2026-01-26
CVE-2021-422927.898.7HIGHYES2021-11-17
CVE-2023-367616.597.3MEDIUMYES2023-09-12
CVE-2023-353118.896.7HIGHYES2023-07-11
CVE-2024-381898.894.7HIGHYES2024-08-13
CVE-2024-382267.385.3HIGHYES2024-09-10
CVE-2026-215147.874.7HIGHYES2026-02-10
CVE-2023-217169.899.7CRITICAL—2023-02-14
CVE-2024-213788.895.8HIGH—2024-02-13
CVE-2024-435047.893.6HIGH—2024-10-08
CVE-2021-413686.191.9MEDIUM—2021-11-10
CVE-2026-215117.589.8HIGH—2026-02-10
CVE-2024-301038.888.6HIGH—2024-06-11

Recent CVEs

Most recently seen
CVECVSSEPSS %ileSeverityKEVFirst seen
CVE-2026-1002087.526.2HIGH—2026-09-25
CVE-2026-701258.835.4HIGH—2026-09-23
CVE-2026-785178.855.8HIGH—2026-09-08
CVE-2026-785188.857.1HIGH—2026-09-08
CVE-2026-785118.855.8HIGH—2026-09-08
CVE-2026-785156.559.0MEDIUM—2026-09-08
CVE-2026-785135.543.6MEDIUM—2026-09-08
CVE-2026-785099.860.8CRITICAL—2026-09-08
CVE-2026-785108.425.5HIGH—2026-09-08
CVE-2026-785058.855.8HIGH—2026-09-08
CVE-2026-785048.855.8HIGH—2026-09-08
CVE-2026-785026.559.0MEDIUM—2026-09-08
CVE-2026-778987.547.4HIGH—2026-09-08
CVE-2026-697978.855.8HIGH—2026-09-08
CVE-2026-697788.855.8HIGH—2026-09-08

KEV entries

CISA Known Exploited Vulnerabilities (newest addition first)
CVEKEV addedCVSSEPSS %ileSeverity
CVE-2026-215142026-02-107.874.7HIGH
CVE-2026-215092026-01-267.899.4HIGH
CVE-2024-214132025-02-069.899.9CRITICAL
CVE-2024-382262024-09-107.385.3HIGH
CVE-2024-381892024-08-138.894.7HIGH
CVE-2023-367612023-09-126.597.3MEDIUM
CVE-2023-353112023-07-118.896.7HIGH
CVE-2023-233972023-03-149.899.9CRITICAL
CVE-2021-422922021-11-177.898.7HIGH

Related

Vendor: Microsoft — all products and the full vendor record.

Methodology

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.