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Security

Microsoft security updates and public advisory evidence: affected products, fixing updates, exploitation and source coverage.

Security Update Guide CISA KEV
1474Microsoft CVEsreleased Tue 13 Oct 94Critical81 need an update · 13 fixed service-side 1Exploited in the wild
1Publicly disclosed
1In CISA KEV
256Revised since release

September 2026: 998 CVEs · 132 critical · 2 exploited · 2 in CISA KEV

Act first · October 2026

Exploited, KEV-listed, or publicly disclosed
CVE-2026-96951ImportantExploitedCISA KEV · due 16 OctSFBNetwork
Windows Shell Security Feature Bypass Vulnerability
CVSS 8.8 KB5126646KB5126651KB5126653+6
Patch next · critical, "exploitation more likely", or top 5% EPSS · needs an update183
CVSS 8.1 · EPSS 1.4% KB5128895KB5128896KB5128897+1
CVSS 8.1 · EPSS 1.0% KB5126646KB5126651KB5126653+7
CVSS 8.8 · EPSS 2.7% KB5129955KB5129956KB5129957+1
Showing 3 of 183All critical

CVEs · October 2026

43 matches · most urgent first CSVText
CVE Vulnerability Severity CVSSEPSSImpact StatusFixed by
CVE-2026-102221 Secure Boot Security Feature Bypass VulnerabilityWindows Secure Boot Important 4.40.4%SFBLocal
KB5126646KB5126651+6
CVE-2026-70075 Windows Virtualization-Based Security (VBS) Enclave Security Feature Bypass VulnerabilityWindows Virtualization-Based Security (VBS) Enclave Important 4.40.3%SFBLocal
KB5126646KB5126651+5
CVE-2026-70280 Windows Hello Security Feature Bypass VulnerabilityWindows Hello Important 4.40.4%SFBLocal
KB5126653KB5126657+2
CVE-2026-83926 Windows Hello Security Feature Bypass VulnerabilityWindows Hello Important 4.40.4%SFBLocal Revised 10 Nov
KB5126646KB5126651+5
CVE-2026-70116 Windows Resilient File System (ReFS) Security Feature Bypass VulnerabilityWindows Resilient File System (ReFS) Important 4.20.4%SFBPhysical
KB5126646KB5127646+1
CVE-2026-83766 Windows Hyper-V Security Feature Bypass VulnerabilityWindows Hyper-V Important 4.20.4%SFBAdjacent
KB5126646KB5126651+6
CVE-2026-85330 Microsoft Edge for Android Security Feature Bypass VulnerabilityMicrosoft Edge for Android Moderate 4.30.4%SFBNetwork
—

Advisories · October 2026

MSRC guidance without a CVE of its own · 1 advisory
ADV260001
Hardening changes for ReFS volumes on removable mediaStarting with Windows updates released on and after October 13, 2026, Microsoft is making hardening changes to the Resilient File System (ReFS) . This change is not enable by default until 2027. Please see Hardening changes for ReFS volumes on removable media for more information.
Published 13 Oct28 affected products
ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 11 Nov 16:19 UTC · 274 of 275 readable · 273 fully read · documentation 469/469 current

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