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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

262 matches · most urgent first CSVText
CVE Vulnerability Severity CVSSEPSSImpact StatusFixed by
CVE-2026-70232 Windows Kernel Information Disclosure VulnerabilityWindows Kernel Important 5.50.9%Information DisclosureLocal
KB5126646KB5126651+8
CVE-2026-70234 Desktop Window Manager Information Disclosure VulnerabilityDesktop Window Manager Important 5.50.4%Information DisclosureLocal
KB5126646KB5126651+6
CVE-2026-70260 Microsoft Trace Data Helper Information Disclosure VulnerabilityMicrosoft Trace Data Helper Important 5.50.9%Information DisclosureLocal
KB5126646KB5126651+8
CVE-2026-70261 Microsoft Trace Data Helper Information Disclosure VulnerabilityMicrosoft Trace Data Helper Important 5.50.9%Information DisclosureLocal
KB5126646KB5126651+8
CVE-2026-70264 Microsoft Defender Information Disclosure VulnerabilityMicrosoft Defender Important 5.50.5%Information DisclosureLocal
—
CVE-2026-70277 Windows Fast FAT File System Driver Information Disclosure VulnerabilityWindows Fast FAT Driver Important 5.50.6%Information DisclosureLocal Revised 27 Oct
KB5126646KB5126651+8
CVE-2026-70284 Win32k Information Disclosure VulnerabilityWindows Win32 Kernel Subsystem Important 5.50.5%Information DisclosureLocal
KB5126646KB5126651+8
CVE-2026-70288 Win32k Information Disclosure VulnerabilityWindows Win32 Kernel Subsystem Important 5.50.4%Information DisclosureLocal
KB5126646KB5126651+8
CVE-2026-70292 Win32k Information Disclosure VulnerabilityWindows Win32 Kernel Subsystem Important 5.50.5%Information DisclosureLocal
KB5126646KB5126651+8
CVE-2026-70293 Win32k Information Disclosure VulnerabilityWindows Win32 Kernel Subsystem Important 5.50.5%Information DisclosureLocal
KB5126646KB5126651+8
CVE-2026-70294 Win32k Information Disclosure VulnerabilityWindows Win32 Kernel Subsystem Important 5.50.5%Information DisclosureLocal
KB5126646KB5126651+8
CVE-2026-70295 Win32k Information Disclosure VulnerabilityWindows Win32 Kernel Subsystem Important 5.50.5%Information DisclosureLocal
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 20:03 UTC · 274 of 275 readable · 273 fully read · documentation 469/469 current

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