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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
998Microsoft CVEsreleased Tue 8 Sep 132Critical105 need an update · 27 fixed service-side 2Exploited in the wild
0Publicly disclosed
2In CISA KEV
249Revised since release

Act first · September 2026

Exploited, KEV-listed, or publicly disclosed
CVE-2026-81963ImportantExploitedCISA KEV · due 22 SepEoPLocal
Windows Update Stack Elevation of Privilege Vulnerability
CVSS 7.8 KB5122871KB5122880KB5124008+1
CVSS 7.8 KB5122876KB5122878KB5122882+3
Patch next · critical, "exploitation more likely", or top 5% EPSS · needs an update154
CVSS 9.8 · EPSS 1.0% KB5122871KB5122876KB5122882+3
CVSS 8.8 · EPSS 0.8% KB5122871KB5122876KB5122878+7
CVSS 9.0 · EPSS 0.7% No KB listed
Showing 3 of 154All critical

CVEs · September 2026

998 matches · most urgent first CSVText
CVE Vulnerability Severity CVSSEPSSImpact StatusFixed by
CVE-2026-85921 Windows Secure Kernel Mode Elevation of Privilege VulnerabilityWindows Secure Kernel Mode Critical 8.20.3%EoPLocal Revised 27 Sep
KB5129194
CVE-2026-69530 Windows Reliable Multicast Transport Driver (RMCAST) Remote Code Execution VulnerabilityReliable Multicast Transport Driver (RMCAST) Critical 8.10.7%RCENetwork
KB5122871KB5122876+1
CVE-2026-69813 Windows DNS Server Remote Code Execution VulnerabilityWindows DNS Critical 8.10.7%RCENetwork
KB5122871KB5122876+4
CVE-2026-69827 Windows DNS Server Remote Code Execution VulnerabilityRole: DNS Server Critical 8.10.5%RCENetwork
KB5122871KB5122876+4
CVE-2026-69858 Windows DNS Server Remote Code Execution VulnerabilityWindows DNS Critical 8.10.7%RCENetwork
KB5122871KB5122882
CVE-2026-72981 IP Helper Remote Code Execution VulnerabilityIP Helper Critical 8.10.7%RCENetwork
KB5122871KB5122876+8
CVE-2026-72987 Windows DNS Remote Code Execution VulnerabilityWindows DNS Critical 8.10.7%RCENetwork Revised 9 Oct
KB5122871KB5122876+4
CVE-2026-77505 Windows DNS Server Remote Code Execution VulnerabilityRole: DNS Server Critical 8.10.7%RCENetwork
KB5122871KB5122876+4
CVE-2026-78444 Microsoft Failover Cluster Remote Code Execution VulnerabilityWindows Failover Cluster Critical 8.10.7%RCENetwork
KB5122871KB5122876+1
CVE-2026-78449 Windows Reliable Multicast Transport Driver (RMCAST) Remote Code Execution VulnerabilityReliable Multicast Transport Driver (RMCAST) Critical 8.10.7%RCENetwork
KB5122871KB5122876+8
CVE-2026-78450 Windows Reliable Multicast Transport Driver (RMCAST) Remote Code Execution VulnerabilityReliable Multicast Transport Driver (RMCAST) Critical 8.10.7%RCENetwork
KB5122871KB5122876+1
CVE-2026-58599 HEVC Video Extensions Remote Code Execution VulnerabilityMicrosoft Windows Codecs Library Critical 7.80.5%RCELocal
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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 06:50 UTC · 275 of 275 readable · 273 fully read · documentation 469/469 current

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