Vendor advisories

Microsoft Security Response Center

Browse 15,859 advisories from this official source. Search by product, CVE, severity, or advisory ID.

Current Checked 5 hours ago Checked every 6 hours

15,859 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-2026-109468
HighCVSS 7.5

ASP.NET Core Denial of Service Vulnerability

Allocation of resources without limits or throttling in ASP.NET Core allows an unauthorized attacker to deny service over a network.

Affected productsSystem.Formats.Cbor on .NET 10.0 runtime installed on Windows, System.Formats.Cbor on .NET 10.0 runtime installed on Linux, System.Formats.Cbor on .NET 10.0 runtime installed on Mac OS, System.Formats.Cbor on .NET 8.0 runtime installed on Windows
Fixed versions10.0.13, 8.0.1, 9.0.21, 18.10.4
Vendor guidance

Release Notes

Microsoft Security Response CenterCVE-2026-97777
HighCVSS 8.8

Microsoft Office Excel Remote Code Execution Vulnerability

Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.

Affected productsMicrosoft Office 365 for Mac, Microsoft Office LTSC for Mac 2021, Microsoft Office LTSC for Mac 2024, Microsoft Office LTSC 2021 for 64-bit editions
Fixed versions16.114.26101123, 16.0.14334.20974, 16.0.17932.21056, https://aka.ms/OfficeSecurityReleases
Vendor guidance

Release Notes Install KB5002928.

Microsoft Security Response CenterCVE-2026-96237
HighCVSS 7.5

.NET Remote Code Execution Vulnerability

Inclusion of functionality from untrusted control sphere in .NET allows an unauthorized attacker to execute code over a network.

Affected productsMicrosoft Visual Studio 2026 version 18.10, Microsoft Visual Studio 2022 version 17.14, .NET 8.0 runtime installed on Windows, .NET 8.0 runtime installed on Linux
Fixed versions18.10.4, 17.14.42, 8.0.132, 10.0.113
Vendor guidance

Release Notes Install KB5130034. Install KB5130036. Install KB5130035.

Microsoft Security Response CenterCVE-2026-87716
HighCVSS 7.5

Windows Storage Spaces Controller Denial of Service Vulnerability

Heap-based buffer overflow in Windows Storage Spaces Controller allows an unauthorized attacker to deny service over a network.

Affected productsWindows 11 Version 26H2 for x64-based Systems, Windows Server 2025, Windows Server 2025 (Server Core installation), Windows 11 Version 26H1 for ARM64-based Systems
Fixed versions10.0.26300.9711, 10.0.26100.33650, 10.0.28000.3231, 10.0.17763.9376
Vendor guidance

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

Microsoft Security Response CenterCVE-2026-85822
HighCVSS 7.8

Windows exFAT File System Elevation of Privilege Vulnerability

Heap-based buffer overflow in Windows exFAT File System 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-2026-85790
HighCVSS 5.9

Microsoft QUIC Information Disclosure Vulnerability

Use after free in Microsoft QUIC allows an unauthorized attacker to disclose information over a network.

Affected productsWindows 11 Version 26H2 for ARM64-based Systems, Windows 11 Version 26H2 for x64-based Systems, Microsoft Visual Studio 2026 version 18.10, Microsoft Visual Studio 2022 version 17.14
Fixed versions10.0.26300.9711, 18.10.4, 17.14.42, 2.6.2
Vendor guidance

Release Notes Install KB5127648. Install KB5126655. Install KB5126646. Install KB5126653. Install KB5127646.

Microsoft Security Response CenterCVE-2026-85377
HighCVSS 7.8

Windows CD-ROM Driver Elevation of Privilege Vulnerability

Access of resource using incompatible type ('type confusion') in Windows CD-ROM Driver 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-2026-83708
HighCVSS 7.0

Windows Installer Elevation of Privilege Vulnerability

Stack-based buffer overflow 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-2026-83518
HighCVSS 7.8

RPC Runtime Elevation of Privilege Vulnerability

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

Affected productsWindows 11 Version 25H2 for ARM64-based Systems, Windows 11 Version 25H2 for x64-based Systems, Windows 11 Version 23H2 for ARM64-based Systems, Windows 11 Version 23H2 for x64-based Systems
Fixed versions10.0.26200.9445, 10.0.22631.7582, 10.0.26100.9445, 10.0.28000.2954
Vendor guidance

Install KB5124008. Install KB5122880. Install KB5124012.

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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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