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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

72 matches · most urgent first CSVText
CVE Vulnerability Severity CVSSEPSSImpact StatusFixed by
CVE-2026-83855 Windows WLAN Service Denial of Service VulnerabilityWindows WLAN Service Important 7.51.3%DoSNetwork
KB5126646KB5126653+2
CVE-2026-83860 Windows GDI Denial of Service VulnerabilityWindows GDI Important 7.51.3%DoSNetwork Revised 4 Nov
KB5126646KB5126651+8
CVE-2026-84008 .NET Denial of Service Vulnerability.NET Important 7.51.0%DoSNetwork Revised 15 Oct
KB5126868KB5127660+17
CVE-2026-84017 Windows Routing and Remote Access Service (RRAS) Denial of Service VulnerabilityWindows Routing and Remote Access Service (RRAS) Important 7.51.1%DoSNetwork
KB5126646KB5126651+8
CVE-2026-85319 Active Directory Federation Services (AD FS) Denial of Service VulnerabilityActive Directory Federation Services (AD FS) Important 7.51.1%DoSNetwork
KB5126646KB5126651+4
CVE-2026-85321 Active Directory Federation Services (AD FS) Denial of Service VulnerabilityActive Directory Federation Services (AD FS) Important 7.51.0%DoSNetwork
KB5126646KB5126651+3
CVE-2026-85324 Active Directory Federation Services (AD FS) Denial of Service VulnerabilityActive Directory Federation Services (AD FS) Important 7.50.8%DoSNetwork
KB5126646KB5126651+4
CVE-2026-85808 Windows Routing and Remote Access Service (RRAS) Denial of Service VulnerabilityWindows Routing and Remote Access Service (RRAS) Important 7.51.1%DoSNetwork
KB5126646KB5126651+8
CVE-2026-87716 Windows Storage Spaces Controller Denial of Service VulnerabilityWindows Storage Spaces Controller Important 7.51.1%DoSNetwork Revised 16 Oct
KB5126646KB5126651+5
CVE-2026-96233 ASP.NET Core Denial of Service VulnerabilityASP.NET Core Important 7.51.0%DoSNetwork Revised 15 Oct
KB5126868KB5127660+20
CVE-2026-96236 ASP.NET Core Denial of Service VulnerabilityASP.NET Core Important 7.51.1%DoSNetwork Revised 15 Oct
KB5130034KB5130035+1
CVE-2026-96248 Windows Host Guardian Service Denial of Service VulnerabilityWindows Host Guardian Service Important 7.51.1%DoSNetwork
KB5126646KB5126651+2

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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