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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

349 matches · most urgent first CSVText
CVE Vulnerability Severity CVSSEPSSImpact StatusFixed by
CVE-2026-88120 Windows DHCP Server Remote Code Execution VulnerabilityWindows DHCP Server Critical 8.10.8%RCENetwork
KB5126646KB5126651+4
CVE-2026-88171 Windows DHCP Server Remote Code Execution VulnerabilityWindows DHCP Server Critical 8.10.7%RCENetwork
KB5126646KB5126651+4
CVE-2026-88174 Windows Deployment Services Remote Code Execution VulnerabilityWindows Deployment Services Critical 8.10.4%RCENetwork
KB5126646KB5126651+4
CVE-2026-88185 Microsoft Office Word Remote Code Execution VulnerabilityMicrosoft Office Word Critical 8.10.8%RCENetwork Revised 15 Oct
—
CVE-2026-100215 Microsoft Graphics Component Remote Code Execution VulnerabilityMicrosoft Graphics Component Critical 7.80.5%RCELocal
KB5126646KB5126651+7
CVE-2026-108448 Microsoft Office Outlook Remote Code Execution VulnerabilityMicrosoft Office Outlook Critical 7.50.5%RCENetwork
—
CVE-2026-69789 Windows Reliable Multicast Transport Driver (RMCAST) Remote Code Execution VulnerabilityReliable Multicast Transport Driver (RMCAST) Critical 7.50.5%RCEAdjacent
KB5122871KB5122876+8
CVE-2026-88207 Microsoft Office PowerPoint Remote Code Execution VulnerabilityMicrosoft Office PowerPoint Critical 7.50.6%RCENetwork Revised 15 Oct
—
CVE-2026-100222 Network Policy Server (NPS) Remote Code Execution VulnerabilityNetwork Policy Server (NPS) Important 9.81.1%RCENetwork
KB5126646KB5126651+8
CVE-2026-102210 Windows Text Shaping Remote Code Execution VulnerabilityWindows Text Shaping Important 9.81.0%RCENetwork
KB5126646KB5126651+5
CVE-2026-69634 Windows iSCSI Remote Code Execution VulnerabilityWindows iSCSI Important 9.80.9%RCENetwork
KB5126646KB5126651+8
CVE-2026-69639 Windows libarchive Remote Code Execution VulnerabilityWindows Libarchive Important 9.80.9%RCENetwork
KB5126646KB5126651+5

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