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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-2026-83507 Windows Update Orchestrator Service Information Disclosure VulnerabilityWindows Update Orchestrator Service Important 5.50.5%Information DisclosureLocal
KB5126646KB5126653+4
CVE-2026-83565 Windows Encrypting File System (EFS) Information Disclosure VulnerabilityWindows Encrypting File System (EFS) Important 5.50.5%Information DisclosureLocal
KB5126646KB5126651+6
CVE-2026-83571 Windows Audio Service Information Disclosure VulnerabilityWindows Audio Service Important 5.50.5%Information DisclosureLocal
KB5126646KB5126651+8
CVE-2026-83658 Windows Error Reporting Information Disclosure VulnerabilityWindows Error Reporting Important 5.50.3%Information DisclosureLocal
KB5126646KB5126651+5
CVE-2026-83664 Windows Portable Device File System Driver Information Disclosure VulnerabilityWindows Portable Device File System Driver Important 5.50.4%Information DisclosureLocal
KB5126646KB5126651+8
CVE-2026-83668 Windows WLAN Service Information Disclosure VulnerabilityWindows WLAN Service Important 5.50.4%Information DisclosureLocal
KB5126646KB5126651+8
CVE-2026-83686 Microsoft Windows Search Component Information Disclosure VulnerabilityMicrosoft Windows Search Component Important 5.50.5%Information DisclosureLocal
KB5126646KB5126651+8
CVE-2026-83695 Windows Event Logging Service Information Disclosure VulnerabilityWindows Event Logging Service Important 5.50.5%Information DisclosureLocal
KB5126646KB5126651+8
CVE-2026-83705 HTTP.sys Information Disclosure VulnerabilityWindows HTTP.sys Important 5.50.9%Information DisclosureLocal
KB5126646KB5126651+8
CVE-2026-83713 Windows Universal Disk Format File System Driver (UDFS) Information Disclosure VulnerabilityWindows Universal Disk Format File System Driver (UDFS) Important 5.50.9%Information DisclosureLocal
KB5126646KB5126651+8
CVE-2026-83714 HTTP.sys Information Disclosure VulnerabilityWindows HTTP.sys Important 5.50.4%Information DisclosureLocal
KB5126646KB5126651+8
CVE-2026-83719 Servicing Stack Updates Information Disclosure VulnerabilityServicing Stack Updates Important 5.50.4%Information DisclosureLocal
KB5126646KB5126651+5

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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