Cyber Resilience

CVE-2026-20806

Medium

Published: 14 April 2026

Published
14 April 2026
Modified
24 April 2026
KEV Added
—
Patch
—
CVSS Score v3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
EPSS Score 0.0012 30.6th percentile
Risk Priority 11 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-20806 is a medium-severity Type Confusion (CWE-843) vulnerability in Microsoft Windows 10 21H2. Its CVSS base score is 5.5 (Medium).

Operationally, ranked at the 30.6th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

Access of resource using incompatible type ('type confusion') in Windows COM allows an authorized attacker to disclose information locally.

CWE(s)
CWE-843

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

microsoft
windows 10 1809
≤ 10.0.17763.8644 · ≤ 10.0.17763.8644
microsoft
windows 10 21h2
≤ 10.0.19044.7184 · ≤ 10.0.19044.7184 · ≤ 10.0.19044.7184
microsoft
windows 10 22h2
≤ 10.0.19045.7184 · ≤ 10.0.19045.7184 · ≤ 10.0.19045.7184
microsoft
windows 11 23h2
≤ 10.0.22631.6936 · ≤ 10.0.22631.6936
microsoft
windows 11 24h2
≤ 10.0.26100.8246 · ≤ 10.0.26100.8246
microsoft
windows 11 25h2
≤ 10.0.26200.8246 · ≤ 10.0.26200.8246
microsoft
windows 11 26h1
≤ 10.0.28000.1836 · ≤ 10.0.28000.1836
microsoft
windows server 2019
≤ 10.0.17763.8644
microsoft
windows server 2022
≤ 10.0.20348.5020
microsoft
windows server 2022 23h2
≤ 10.0.25398.2274
+1 more product configuration(s) — see NVD for full list

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References