Vendor advisories

Microsoft Security Response Center

Browse 15,943 advisories from this official source. Search by product, CVE, severity, or advisory ID.

Current Checked 15 minutes ago Checked every 6 hours

15,943 advisories

Each date says whether the vendor published or updated the bulletin. A vendor bulletin describes products that may be affected. It does not prove that the vulnerable product or version is installed in your environment.

RSS for these results
Microsoft Security Response CenterCVE-2026-87700
HighCVSS 7.8

Windows Installer Elevation of Privilege Vulnerability

Use after free in Windows Installer allows an authorized attacker to elevate privileges locally.

Affected productsWindows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation)
Fixed versions10.0.17763.9376, 10.0.20348.5761, 10.0.19044.7807, 10.0.19045.7807
Vendor guidance

Install KB5126651. Install KB5126655. Install KB5126657. Install KB5126646. Install KB5127648. Install KB5126653. Install KB5127646. Install KB5126868. Install KB5126835. Install KB5126836.

Microsoft Security Response CenterCVE-2026-87699
HighCVSS 7.8

Winlogon Elevation of Privilege Vulnerability

Heap-based buffer overflow in Winlogon allows an authorized attacker to elevate privileges locally.

Affected productsWindows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation)
Fixed versions10.0.17763.9376, 10.0.20348.5761, 10.0.19044.7807, 10.0.19045.7807
Vendor guidance

Install KB5126651. Install KB5126655. Install KB5126657. Install KB5126646. Install KB5127648. Install KB5126653. Install KB5127646. Install KB5126868. Install KB5126835. Install KB5126836.

Microsoft Security Response CenterCVE-2026-87698
HighCVSS 5.5

Windows Remote Access Service Infrastructure Information Disclosure Vulnerability

Out-of-bounds read in Windows Remote Access Service Infrastructure allows an authorized attacker to disclose information locally.

Affected productsWindows 11 Version 26H2 for ARM64-based Systems, Windows 11 Version 26H2 for x64-based Systems, Windows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems
Fixed versions10.0.26300.9711, 10.0.17763.9376, 10.0.20348.5761, 10.0.19044.7807
Vendor guidance

Install KB5127648. Install KB5126651. Install KB5126655. Install KB5126657. Install KB5126646. Install KB5126653. Install KB5127646. Install KB5126868. Install KB5126835. Install KB5126836.

Microsoft Security Response CenterCVE-2026-87696
HighCVSS 7.5

Microsoft Exchange Server Elevation of Privilege Vulnerability

Improper verification of cryptographic signature in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.

Affected productsMicrosoft Exchange Server 2019 Cumulative Update 15, Microsoft Exchange Server Subscription Edition RTM, Microsoft Exchange Server 2019 Cumulative Update 14, Microsoft Exchange Server 2016 Cumulative Update 23
Fixed versions15.02.1748.055, 15.02.2562.056, 15.02.1544.050, 15.01.2507.077
Vendor guidance

Install KB5128896. Install KB5128895. Install KB5128897. Install KB5128898.

Microsoft Security Response CenterCVE-2026-87695
HighCVSS 7.8

Microsoft Exchange Server Elevation of Privilege Vulnerability

Inclusion of functionality from untrusted control sphere in Microsoft Exchange Server allows an authorized attacker to elevate privileges locally.

Affected productsMicrosoft Exchange Server Subscription Edition RTM, Microsoft Exchange Server 2019 Cumulative Update 15, Microsoft Exchange Server 2019 Cumulative Update 14, Microsoft Exchange Server 2016 Cumulative Update 23
Fixed versions15.02.2562.056, 15.02.1748.055, 15.02.1544.050, 15.01.2507.077
Vendor guidance

Install KB5128895. Install KB5128896. Install KB5128897. Install KB5128898.

Microsoft Security Response CenterCVE-2026-87694
HighCVSS 7.8

Windows Installer Elevation of Privilege Vulnerability

Use after free in Windows Installer allows an authorized attacker to elevate privileges locally.

Affected productsWindows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation)
Fixed versions10.0.17763.9376, 10.0.20348.5761, 10.0.19044.7807, 10.0.19045.7807
Vendor guidance

Install KB5126651. Install KB5126655. Install KB5126657. Install KB5126646. Install KB5127648. Install KB5126653. Install KB5127646. Install KB5126868. Install KB5126835. Install KB5126836.

Microsoft Security Response CenterCVE-2026-87693
HighCVSS 7.0

Windows Installer Elevation of Privilege Vulnerability

Use after free in Windows Installer allows an authorized attacker to elevate privileges locally.

Affected productsWindows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation)
Fixed versions10.0.17763.9376, 10.0.20348.5761, 10.0.19044.7807, 10.0.19045.7807
Vendor guidance

Install KB5126651. Install KB5126655. Install KB5126657. Install KB5126646. Install KB5127648. Install KB5126653. Install KB5127646. Install KB5126868. Install KB5126835. Install KB5126836.

Microsoft Security Response CenterCVE-2026-87692
HighCVSS 7.8

Microsoft Exchange Server Elevation of Privilege Vulnerability

Deserialization of untrusted data in Microsoft Exchange Server allows an authorized attacker to elevate privileges locally.

Affected productsMicrosoft Exchange Server 2016 Cumulative Update 23, Microsoft Exchange Server 2019 Cumulative Update 14, Microsoft Exchange Server Subscription Edition RTM
Fixed versions15.01.2507.077, 15.02.1544.050, 15.02.2562.056
Vendor guidance

Install KB5128898. Install KB5128897. Install KB5128895.

Microsoft Security Response CenterCVE-2026-87691
HighCVSS 7.8

Windows Management Services Elevation of Privilege Vulnerability

Use after free in Windows Management Services allows an authorized attacker to elevate privileges locally.

Affected productsWindows Server 2025 (Server Core installation), Windows 11 Version 25H2 for ARM64-based Systems, Windows 11 Version 25H2 for x64-based Systems, Windows 11 Version 23H2 for ARM64-based Systems
Fixed versions10.0.26100.33650, 10.0.26200.9711, 10.0.22631.7652, 10.0.26100.9711
Vendor guidance

Install KB5126646. Install KB5127648. Install KB5126653. Install KB5127646.

Microsoft Security Response CenterCVE-2026-85945
HighCVSS 7.8

Windows Kernel Elevation of Privilege Vulnerability

Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.

Affected productsWindows 11 Version 26H2 for ARM64-based Systems, Windows 11 Version 26H2 for x64-based Systems, Windows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems
Fixed versions10.0.26300.9711, 10.0.17763.9376, 10.0.20348.5761, 10.0.19044.7807
Vendor guidance

Install KB5127648. Install KB5126651. Install KB5126655. Install KB5126657. Install KB5126646. Install KB5126653. Install KB5127646. Install KB5126868. Install KB5126835. Install KB5126836.

Microsoft Security Response CenterCVE-2026-85943
HighCVSS 7.0

Reliable Multicast Transport Driver (RMCAST) Elevation of Privilege Vulnerability

Time-of-check time-of-use (toctou) race condition in Reliable Multicast Transport Driver (RMCAST) allows an authorized attacker to elevate privileges locally.

Affected productsWindows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation)
Fixed versions10.0.17763.9376, 10.0.20348.5761, 10.0.19044.7807, 10.0.19045.7807
Vendor guidance

Install KB5126651. Install KB5126655. Install KB5126657. Install KB5126646. Install KB5127648. Install KB5126653. Install KB5127646. Install KB5126868. Install KB5126835. Install KB5126836.

Microsoft Security Response CenterCVE-2026-85941
HighCVSS 7.0

Windows Installer Elevation of Privilege Vulnerability

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Installer allows an authorized attacker to elevate privileges locally.

Affected productsWindows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation)
Fixed versions10.0.17763.9376, 10.0.20348.5761, 10.0.19044.7807, 10.0.19045.7807
Vendor guidance

Install KB5126651. Install KB5126655. Install KB5126657. Install KB5126646. Install KB5127648. Install KB5126653. Install KB5127646. Install KB5126868. Install KB5126835. Install KB5126836.

Microsoft Security Response CenterCVE-2026-85939
HighCVSS 5.3

Windows Kernel Security Feature Bypass Vulnerability

Weak authentication in Windows Kernel allows an authorized attacker to bypass a security feature over a network.

Affected productsWindows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation)
Fixed versions10.0.17763.9376, 10.0.20348.5761, 10.0.19044.7807, 10.0.19045.7807
Vendor guidance

Install KB5126651. Install KB5126655. Install KB5126657. Install KB5126646. Install KB5127648. Install KB5126653. Install KB5127646. Install KB5126868.

Microsoft Security Response CenterCVE-2026-85938
HighCVSS 5.5

Windows Broadcast DVR User Service Information Disclosure Vulnerability

Improper access control in Windows Broadcast DVR User Service allows an authorized attacker to disclose information locally.

Affected productsWindows 11 Version 26H2 for ARM64-based Systems, Windows 11 Version 26H2 for x64-based Systems, Windows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems
Fixed versions10.0.26300.9711, 10.0.17763.9376, 10.0.19044.7807, 10.0.19045.7807
Vendor guidance

Install KB5127648. Install KB5126651. Install KB5126657. Install KB5126653. Install KB5127646.

Microsoft Security Response CenterCVE-2026-85936
HighCVSS 8.8

Windows Shell Remote Code Execution Vulnerability

Double free in Windows Shell allows an unauthorized attacker to execute code over a network.

Affected productsWindows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation)
Fixed versions10.0.17763.9376, 10.0.20348.5761, 10.0.19044.7807, 10.0.19045.7807
Vendor guidance

Install KB5126651. Install KB5126655. Install KB5126657. Install KB5126646. Install KB5127648. Install KB5126653. Install KB5127646. Install KB5126868. Install KB5126835. Install KB5126836.

Microsoft Security Response CenterCVE-2026-85934
HighCVSS 7.0

Windows AppX Deployment Service Elevation of Privilege Vulnerability

Use after free in Windows AppX Deployment Service allows an authorized attacker to elevate privileges locally.

Affected productsWindows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation)
Fixed versions10.0.17763.9376, 10.0.20348.5761, 10.0.19044.7807, 10.0.19045.7807
Vendor guidance

Install KB5126651. Install KB5126655. Install KB5126657. Install KB5126646. Install KB5127648. Install KB5126653. Install KB5127646.

Microsoft Security Response CenterCVE-2026-85933
HighCVSS 7.8

Windows Print Spooler Components Elevation of Privilege Vulnerability

Use after free in Windows Print Spooler Components allows an authorized attacker to elevate privileges locally.

Affected productsWindows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation)
Fixed versions10.0.17763.9376, 10.0.20348.5761, 10.0.19044.7807, 10.0.19045.7807
Vendor guidance

Install KB5126651. Install KB5126655. Install KB5126657. Install KB5126646. Install KB5127648. Install KB5126653. Install KB5127646. Install KB5126868. Install KB5126835. Install KB5126836.

Microsoft Security Response CenterCVE-2026-85932
HighCVSS 6.5

Microsoft Office SharePoint Information Disclosure Vulnerability

Improper limitation of a pathname to a restricted directory ('path traversal') in Microsoft Office SharePoint allows an authorized attacker to disclose information over a network.

Affected productsMicrosoft SharePoint Server Subscription Edition
Fixed versions16.0.20326.20190
Vendor guidance

Install KB5002927.

Microsoft Security Response CenterCVE-2026-85931
HighCVSS 8.8

Windows Distributed File System (DFS) Remote Code Execution Vulnerability

Heap-based buffer overflow in Windows Distributed File System (DFS) allows an authorized attacker to execute code over a network.

Affected productsWindows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation)
Fixed versions10.0.17763.9376, 10.0.20348.5761, 10.0.19044.7807, 10.0.19045.7807
Vendor guidance

Install KB5126651. Install KB5126655. Install KB5126657. Install KB5126646. Install KB5127648. Install KB5126653. Install KB5127646. Install KB5126868. Install KB5126835. Install KB5126836.

Microsoft Security Response CenterCVE-2026-85930
HighCVSS 7.0

Windows Image Acquisition Elevation of Privilege Vulnerability

Use after free in Windows Image Acquisition allows an authorized attacker to elevate privileges locally.

Affected productsWindows Server 2022, Windows Server 2022 (Server Core installation), Windows 10 Version 21H2 for 32-bit Systems, Windows 10 Version 21H2 for ARM64-based Systems
Fixed versions10.0.20348.5761, 10.0.19044.7807, 10.0.19045.7807, 10.0.26100.33650
Vendor guidance

Install KB5126655. Install KB5126657. Install KB5126646. Install KB5127648. Install KB5126653. Install KB5127646.

Microsoft Security Response CenterCVE-2026-85928
HighCVSS 9.8

Windows Volume Manager Extension Driver Remote Code Execution Vulnerability

Heap-based buffer overflow in Windows Volume Manager Extension Driver allows an unauthorized attacker to execute code over a network.

Affected productsWindows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation)
Fixed versions10.0.17763.9376, 10.0.20348.5761, 10.0.19044.7807, 10.0.19045.7807
Vendor guidance

Install KB5126651. Install KB5126655. Install KB5126657. Install KB5126646. Install KB5127648. Install KB5126653. Install KB5127646. Install KB5126868. Install KB5126835. Install KB5126836.

Microsoft Security Response CenterCVE-2026-85927
HighCVSS 7.8

Windows Universal Plug and Play (UPnP) Device Host Elevation of Privilege Vulnerability

Heap-based buffer overflow in Windows Universal Plug and Play (UPnP) Device Host allows an authorized attacker to elevate privileges locally.

Affected productsWindows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation)
Fixed versions10.0.17763.9376, 10.0.20348.5761, 10.0.19044.7807, 10.0.19045.7807
Vendor guidance

Install KB5126651. Install KB5126655. Install KB5126657. Install KB5126646. Install KB5127648. Install KB5126653. Install KB5127646. Install KB5126868. Install KB5126835. Install KB5126836.

Microsoft Security Response CenterCVE-2026-85926
HighCVSS 8.1

Windows Secure Socket Tunneling Protocol (SSTP) Remote Code Execution Vulnerability

Use after free in Windows Secure Socket Tunneling Protocol (SSTP) allows an unauthorized attacker to execute code over a network.

Affected productsWindows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation), Windows 10 Version 21H2 for 32-bit Systems
Fixed versions10.0.17763.9376, 10.0.19044.7807, 10.0.19045.7807, 10.0.20348.5761
Vendor guidance

Install KB5126651. Install KB5126657. Install KB5126655. Install KB5126653. Install KB5127648. Install KB5126646. Install KB5127646. Install KB5126835. Install KB5126836. Install KB5126868.

Microsoft Security Response CenterCVE-2026-85925
HighCVSS 8.2

Azure Key Vault Client SDK Elevation of Privilege Vulnerability

Improper restriction of communication channel to intended endpoints in Azure Key Vault allows an authorized attacker to elevate privileges over a network.

Affected productsazure-keyvault-keys, azure-keyvault-certificates, azure-keyvault-secrets, azure-keyvault-administration
Fixed versions4.10.1, 4.9.1, 4.11.1, 4.8.1
Vendor guidance

Release Notes

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Confirm the installed product and version, read the linked vendor guidance, and test the recommended update or mitigation through your normal change process.

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