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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

349 matches · most urgent first CSVText
CVE Vulnerability Severity CVSSEPSSImpact StatusFixed by
CVE-2026-88121 Windows Background Intelligent Transfer Service (BITS) Remote Code Execution VulnerabilityWindows Background Intelligent Transfer Service (BITS) Important 8.01.2%RCEAdjacent
KB5126646KB5126651+8
CVE-2026-102227 Windows Resilient File System (ReFS) Remote Code Execution VulnerabilityWindows Resilient File System (ReFS) Important 7.80.4%RCELocal Revised 10 Nov
KB5126646KB5126651+6
CVE-2026-69942 Windows Overlay Filter Remote Code Execution VulnerabilityWindows Overlay Filter Important 7.80.4%RCELocal
KB5126646KB5126653+3
CVE-2026-69959 Windows Overlay Filter Remote Code Execution VulnerabilityWindows Overlay Filter Important 7.80.4%RCELocal
KB5126646KB5126651+8
CVE-2026-70052 Microsoft PowerShell Remote Code Execution VulnerabilityWindows PowerShell Important 7.80.4%RCELocal Revised 10 Nov
KB5126646KB5126653+3
CVE-2026-70112 Windows Spaceport.sys Remote Code Execution VulnerabilityWindows Spaceport.sys Important 7.80.4%RCELocal
KB5126646KB5126651+5
CVE-2026-70143 Windows Network File System Remote Code Execution VulnerabilityWindows Network File System Important 7.80.4%RCELocal
KB5126646KB5126651+8
CVE-2026-70220 Microsoft Office Word Remote Code Execution VulnerabilityMicrosoft Office Word Important 7.80.4%RCELocal Revised 15 Oct
—
CVE-2026-70247 HTTP.sys Remote Code Execution VulnerabilityWindows HTTP.sys Important 7.80.3%RCELocal
KB5126646KB5126651+8
CVE-2026-83640 Windows NTFS Remote Code Execution VulnerabilityWindows NTFS Important 7.80.4%RCELocal
KB5126646KB5126651+8
CVE-2026-83712 Windows NTFS Remote Code Execution VulnerabilityWindows NTFS Important 7.80.4%RCELocal
KB5126646KB5126651+5
CVE-2026-83758 Windows Error Reporting Remote Code Execution VulnerabilityWindows Error Reporting Important 7.80.4%RCELocal Revised 10 Nov
KB5126646KB5126651+8

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 19:00 UTC · 274 of 275 readable · 273 fully read · documentation 469/469 current

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