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Security

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

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

72 matches · most urgent first CSVText
CVE Vulnerability Severity CVSSEPSSImpact StatusFixed by
CVE-2026-102192 Windows Failover Cluster Denial of Service VulnerabilityWindows Failover Cluster Important 7.51.3%DoSNetwork
KB5126646KB5126651+1
CVE-2026-103558 Windows Routing and Remote Access Service (RRAS) Denial of Service VulnerabilityWindows Routing and Remote Access Service (RRAS) Important 7.51.0%DoSNetwork
KB5126646KB5126651+8
CVE-2026-109468 ASP.NET Core Denial of Service VulnerabilityASP.NET Core Important 7.51.0%DoSNetwork Revised 16 Oct
—
CVE-2026-58280 .NET Denial of Service Vulnerability.NET Important 7.51.3%DoSNetwork Revised 15 Oct
KB5126868KB5127660+20
CVE-2026-69651 .NET Denial of Service Vulnerability.NET Important 7.51.3%DoSNetwork Revised 15 Oct
KB5126868KB5127660+20
CVE-2026-70031 Windows iSCSI Denial of Service VulnerabilityWindows iSCSI Important 7.51.3%DoSNetwork Revised 16 Oct
KB5126646KB5126651+8
CVE-2026-70033 Windows Remote Desktop Gateway (RD Gateway) Denial of Service VulnerabilityRemote Desktop Gateway Service Important 7.51.3%DoSNetwork
KB5126646KB5126651+4
CVE-2026-70079 Windows DNS Denial of Service VulnerabilityWindows DNS Important 7.51.3%DoSNetwork
KB5126646KB5126651+4
CVE-2026-70082 Windows DNS Denial of Service VulnerabilityWindows DNS Important 7.51.3%DoSNetwork
KB5126646KB5126651+4
CVE-2026-70133 Windows SMB Server Denial of Service VulnerabilityWindows SMB Server Important 7.51.3%DoSNetwork
KB5126646KB5126651+8
CVE-2026-70155 Windows DNS Denial of Service VulnerabilityWindows DNS Important 7.51.3%DoSNetwork
KB5126646KB5126651+4
CVE-2026-70159 ASP.NET Core Denial of Service VulnerabilityASP.NET Core Important 7.51.2%DoSNetwork Revised 15 Oct
—

Advisories · October 2026

MSRC guidance without a CVE of its own · 1 advisory
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 21:06 UTC · 274 of 275 readable · 273 fully read · documentation 469/469 current