Patch tracker / Products / Windows 11 Version 26H1 - extra

Windows 11 Version 26H1 - extra: vulnerabilities and security updates

Every CVE affecting Windows 11 Version 26H1 - extra and the Microsoft update (KB) that fixes it, ranked by real-world risk. Actively exploited (CISA KEV) first, then EPSS exploit probability, on top of CVSS severity.

CVEs
62
Updates (KBs)
1
Actively exploited (KEV)
0
Critical Severity
1

CVEs affecting Windows 11 Version 26H1 - extra

CVESeverityCVSSEPSSStatus
CVE-2025-54518High9.880%-
CVE-2026-41096Critical9.880%-
CVE-2026-34329High8.880%-
CVE-2026-40403High8.880%-
CVE-2026-40415High8.180%-
CVE-2026-33834High7.880%-
CVE-2026-33835High7.880%-
CVE-2026-33837High7.880%-
CVE-2026-33838High7.880%-
CVE-2026-33840High7.880%-
CVE-2026-33841High7.880%-
CVE-2026-34330High7.880%-
CVE-2026-34333High7.880%-
CVE-2026-34334High7.880%-
CVE-2026-34336High7.880%-
CVE-2026-34337High7.880%-
CVE-2026-34338High7.880%-
CVE-2026-34343High7.880%-
CVE-2026-34344High7.880%-
CVE-2026-34351High7.880%-
CVE-2026-35415High7.880%-
CVE-2026-35417High7.880%-
CVE-2026-35418High7.880%-
CVE-2026-35421High7.880%-
CVE-2026-40369High7.880%-
CVE-2026-40377High7.880%-
CVE-2026-40382High7.880%-
CVE-2026-40397High7.880%-
CVE-2026-40398High7.880%-
CVE-2026-40399High7.880%-
CVE-2026-40407High7.880%-
CVE-2026-40408High7.880%-
CVE-2026-41088High7.880%-
CVE-2026-42896High7.880%-
CVE-2026-32161High7.580%-
CVE-2026-35424High7.580%-
CVE-2026-40405High7.580%-
CVE-2026-40406High7.580%-
CVE-2026-40413High7.480%-
CVE-2026-40414High7.480%-
CVE-2026-40401High7.180%-
CVE-2026-33839High7.080%-
CVE-2026-34331High7.080%-
CVE-2026-34340High7.080%-
CVE-2026-34341High7.080%-
CVE-2026-34342High7.080%-
CVE-2026-34345High7.080%-
CVE-2026-34347High7.080%-
CVE-2026-35416High7.080%-
CVE-2026-40410High7.080%-
CVE-2026-42825High7.080%-
CVE-2026-21530Medium6.780%-
CVE-2026-32170Medium6.780%-
CVE-2026-41097Medium6.780%-
CVE-2026-35422Medium6.580%-
CVE-2026-40380Medium6.280%-
CVE-2026-48566Medium5.580%-
CVE-2026-34339Medium5.580%-
CVE-2026-35419Medium5.580%-
CVE-2026-35423Medium5.480%-
CVE-2026-32209Medium4.480%-
CVE-2026-34348Medium6.571%-

Updates (KBs) for Windows 11 Version 26H1 - extra

UpdateReleasedSeverityCVSSEPSSCVEsStatus
KB50895482026-05-12Critical9.84.7%62-

Ranked across all products on the Microsoft patch tracker and the CVE and vulnerability management reference. Browse every product: product index.

Most searched on Senserva right now

KB5122876 install notes and severity KB5126052: the full CVE list KB5129238: the full CVE list KB5126651 download and what it fixes KB5122882: the full CVE list KB5129235: the full CVE list KB5126655: patch details KB5126657 install notes and severity KB5123099 install notes and severity KB5122871 install notes and severity
New to a term on this page? CVE, KB, KEV, CVSS, and EPSS are each explained once, on the Senserva security lexicon. Reference: Microsoft CVE and vulnerability management and the Microsoft patching guide.
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