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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

CVEs · all collected releases

2592 matches in Windows · most urgent first CSVText
CVE Vulnerability Severity CVSSEPSSImpact StatusFixed by
CVE-2026-77896 Windows Remote Desktop Client Denial of Service VulnerabilityRemote Desktop Client Important 6.50.7%DoSNetwork
KB5122871KB5122876+6
CVE-2026-78453 Microsoft Windows SCSI Class System File Information Disclosure VulnerabilityMicrosoft Windows SCSI Class System File Important 6.50.9%Information DisclosureNetwork Revised 7 Oct
KB5122871KB5122876+8
CVE-2026-83515 RPC Runtime Information Disclosure VulnerabilityRPC Runtime Important 6.51.0%Information DisclosureNetwork Fix has a known issue
KB5126646KB5126651+8
CVE-2026-83521 Windows IKE Extension Information Disclosure VulnerabilityWindows IKE Extension Important 6.51.1%Information DisclosureNetwork Fix has a known issue
KB5126646KB5126651+8
CVE-2026-83636 Windows Hyper-V Denial of Service VulnerabilityWindows Hyper-V Important 6.50.4%DoSLocal Fix has a known issue
KB5126646KB5126653+4
CVE-2026-83648 Windows Active Directory Domain Services Denial of Service VulnerabilityActive Directory Domain Services Important 6.51.2%DoSNetwork Fix has a known issue
KB5126646KB5126653+4
CVE-2026-83649 Windows Local Security Authority Subsystem Service (LSASS) Denial of Service VulnerabilityWindows Local Security Authority Subsystem Service (LSASS) Important 6.51.2%DoSNetwork Fix has a known issue
KB5126646KB5126651+6
CVE-2026-83651 Windows GDI Information Disclosure VulnerabilityWindows GDI Important 6.51.0%Information DisclosureNetwork Fix has a known issue
KB5126646KB5126651+8
CVE-2026-83667 Windows Active Directory Domain Services Denial of Service VulnerabilityActive Directory Domain Services Important 6.51.2%DoSNetwork Fix has a known issue
KB5126646KB5126651+8
CVE-2026-83671 Windows Hyper-V Information Disclosure VulnerabilityWindows Hyper-V Important 6.50.5%Information DisclosureLocal Fix has a known issue
KB5126646KB5126651+5
CVE-2026-83683 Windows Encrypting File System (EFS) Information Disclosure VulnerabilityWindows Encrypting File System (EFS) Important 6.51.3%Information DisclosureNetwork Fix has a known issue
KB5126646KB5126651+8
CVE-2026-83685 Windows Internet Key Exchange (IKE) Extension Denial of Service VulnerabilityWindows IKE Extension Important 6.51.3%DoSNetwork Fix has a known issue
KB5126646KB5126651+8

Advisories

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 13 Nov 21:39 UTC · 274 of 275 readable · 270 fully read · documentation 469/469 current

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