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.

Windows 8.1

Product reference — Windows 8.1 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
CVEs1970
KEV entries410
Rate & severity
KEV/100Med CVSSMed EPSSCHML
20.87.8.02092149460

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
2026-010
2026-020
2026-030
2026-040
2026-050
2026-060
2026-070
2026-080
2026-090
2026-100

Notable CVEs

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

Notable (ranked)
CVECVSSEPSS %ileSeverityKEVFirst seen
CVE-2021-345278.8100.0HIGHYES2021-11-03
CVE-2022-301907.899.9HIGHYES2022-06-14
CVE-2021-404448.899.9HIGHYES2021-11-03
CVE-2018-81747.599.8HIGHYES2022-02-15
CVE-2021-16757.899.7HIGHYES2021-11-03
CVE-2022-269238.899.7HIGHYES2022-05-10
CVE-2021-404497.899.5HIGHYES2021-10-13
CVE-2018-84537.899.4HIGHYES2022-01-21
CVE-2022-347137.899.3HIGHYES2022-08-09
CVE-2021-337427.599.1HIGHYES2021-06-08
CVE-2020-10547.099.0HIGHYES2021-11-03
CVE-2022-219997.898.6HIGHYES2022-02-09
CVE-2023-216748.898.6HIGHYES2023-01-10
CVE-2021-344486.898.6MEDIUMYES2021-11-03
CVE-2020-14647.898.6HIGHYES2020-08-17

Recent CVEs

Most recently seen
CVECVSSEPSS %ileSeverityKEVFirst seen
CVE-2023-216748.898.6HIGHYES2023-01-10
CVE-2022-411187.566.1HIGH—2022-11-09
CVE-2022-411097.894.7HIGH—2022-11-09
CVE-2022-411007.822.5HIGH—2022-11-09
CVE-2022-410985.554.2MEDIUM—2022-11-09
CVE-2022-410976.574.9MEDIUM—2022-11-09
CVE-2022-410957.842.2HIGH—2022-11-09
CVE-2022-410937.821.9HIGH—2022-11-09
CVE-2022-410905.963.3MEDIUM—2022-11-09
CVE-2022-410888.162.0HIGH—2022-11-09
CVE-2022-410866.417.2MEDIUM—2022-11-09
CVE-2022-410587.580.9HIGH—2022-11-09
CVE-2022-410577.865.4HIGH—2022-11-09
CVE-2022-410567.580.9HIGH—2022-11-09
CVE-2022-410537.580.8HIGH—2022-11-09

KEV entries

CISA Known Exploited Vulnerabilities (newest addition first)
CVEKEV addedCVSSEPSS %ileSeverity
CVE-2021-432262025-10-067.887.3HIGH
CVE-2018-86392025-03-038.497.6HIGH
CVE-2022-380282024-04-237.896.6HIGH
CVE-2023-216742023-01-108.898.6HIGH
CVE-2022-411282022-11-088.897.8HIGH
CVE-2022-411252022-11-087.887.1HIGH
CVE-2022-410732022-11-087.882.6HIGH
CVE-2022-410332022-10-117.876.4HIGH
CVE-2022-379692022-09-147.898.1HIGH
CVE-2022-269232022-08-188.899.7HIGH
CVE-2022-347132022-08-097.899.3HIGH
CVE-2022-220472022-07-127.897.2HIGH
CVE-2022-269252022-07-018.195.6HIGH
CVE-2022-301902022-06-147.899.9HIGH
CVE-2018-86112022-05-247.890.7HIGH
CVE-2022-219192022-04-257.083.7HIGH
CVE-2022-269042022-04-257.097.0HIGH
CVE-2022-227182022-04-197.897.2HIGH
CVE-2022-245212022-04-137.894.0HIGH
CVE-2021-344842022-03-317.897.6HIGH
CVE-2018-84052022-03-287.888.6HIGH
CVE-2018-84402022-03-287.897.2HIGH
CVE-2022-219992022-03-257.898.6HIGH
CVE-2021-413792022-03-035.597.3MEDIUM
CVE-2018-81742022-02-157.599.8HIGH

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.