# CVE-2026-105016: Microsoft QUIC Remote Code Execution Vulnerability CVE-2026-105016 is fixed in 22 products on 2 platforms, first by Microsoft .NET Windows Desktop Runtime 8.0 8.0.32, released October 5, 2026. 3 other affected products have no fix yet. It is not reported as exploited. Patch Radar priority: Urgent. - Web page: https://patchblox.com/security/cve/CVE-2026-105016 - Priority: Urgent - CVSS: 9.8 (Critical) - EPSS: 0.0166 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Vendor exploitability assessment: Exploitation Less Likely - Published: Oct 13, 2026 - Weakness: Heap-based Buffer Overflow - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-105016 ## Description

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

## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Microsoft | .NET 8.0 runtime installed on Windows | | [KB5130034](https://patchblox.com/security/data/fix/microsoft/kb5130034.md) | Oct 13, 2026 | | Microsoft | .NET 9.0 runtime installed on Windows | | [KB5130035](https://patchblox.com/security/data/fix/microsoft/kb5130035.md) | Oct 13, 2026 | | Microsoft | Windows 11 Version 23H2 for ARM64-based Systems | 22631.7652 | [KB5126653](https://patchblox.com/security/data/fix/microsoft/kb5126653.md) | Oct 13, 2026 | | Microsoft | Windows 11 Version 23H2 for x64-based Systems | 22631.7652 | [KB5126653](https://patchblox.com/security/data/fix/microsoft/kb5126653.md) | Oct 13, 2026 | | Microsoft | Windows 11 Version 24H2 for ARM64-based Systems | | [KB5127648](https://patchblox.com/security/data/fix/microsoft/kb5127648.md) | Oct 13, 2026 | | Microsoft | Windows 11 Version 24H2 for x64-based Systems | | [KB5127648](https://patchblox.com/security/data/fix/microsoft/kb5127648.md) | Oct 13, 2026 | | Microsoft | Windows 11 Version 25H2 for ARM64-based Systems | | [KB5127648](https://patchblox.com/security/data/fix/microsoft/kb5127648.md) | Oct 13, 2026 | | Microsoft | Windows 11 Version 25H2 for x64-based Systems | | [KB5127648](https://patchblox.com/security/data/fix/microsoft/kb5127648.md) | Oct 13, 2026 | | Microsoft | Windows 11 Version 26H1 for ARM64-based Systems | 28000.3231 | [KB5127646](https://patchblox.com/security/data/fix/microsoft/kb5127646.md) | Oct 13, 2026 | | Microsoft | Windows 11 Version 26H2 for ARM64-based Systems | | [KB5127648](https://patchblox.com/security/data/fix/microsoft/kb5127648.md) | Oct 13, 2026 | | Microsoft | Windows 11 Version 26H2 for x64-based Systems | | [KB5127648](https://patchblox.com/security/data/fix/microsoft/kb5127648.md) | Oct 13, 2026 | | Microsoft | Windows 11 version 26H1 for x64-based Systems | 28000.3231 | [KB5127646](https://patchblox.com/security/data/fix/microsoft/kb5127646.md) | Oct 13, 2026 | | Microsoft | Windows Server 2022 | 20348.5761 | [KB5126655](https://patchblox.com/security/data/fix/microsoft/kb5126655.md) | Oct 13, 2026 | | Microsoft | Windows Server 2022 (Server Core installation) | 20348.5761 | [KB5126655](https://patchblox.com/security/data/fix/microsoft/kb5126655.md) | Oct 13, 2026 | | Microsoft | Windows Server 2025 | 26100.33650 | [KB5126646](https://patchblox.com/security/data/fix/microsoft/kb5126646.md) | Oct 13, 2026 | | Microsoft | Windows Server 2025 (Server Core installation) | 26100.33650 | [KB5126646](https://patchblox.com/security/data/fix/microsoft/kb5126646.md) | Oct 13, 2026 | | Windows apps | Microsoft .NET Windows Desktop Runtime 10.0 | 10.0.14 | [Microsoft .NET Windows Desktop Runtime 10.0 10.0.14](https://patchblox.com/security/data/fix/windows-app/microsoft.dotnet.desktopruntime.10-10.0.14.md) | Oct 22, 2026 | | Windows apps | Microsoft .NET Windows Desktop Runtime 8.0 | 8.0.32 | [Microsoft .NET Windows Desktop Runtime 8.0 8.0.32](https://patchblox.com/security/data/fix/windows-app/microsoft.dotnet.desktopruntime.8-8.0.32.md) | Oct 5, 2026 | | Windows apps | Microsoft .NET Windows Desktop Runtime 9.0 | 9.0.21 | [Microsoft .NET Windows Desktop Runtime 9.0 9.0.21](https://patchblox.com/security/data/fix/windows-app/microsoft.dotnet.desktopruntime.9-9.0.21.md) | Oct 5, 2026 | | Windows apps | Microsoft ASP.NET Core Hosting Bundle 10.0 | 10.0.14 | [Microsoft ASP.NET Core Hosting Bundle 10.0 10.0.14](https://patchblox.com/security/data/fix/windows-app/microsoft.dotnet.hostingbundle.10-10.0.14.md) | Oct 23, 2026 | | Windows apps | Microsoft ASP.NET Core Hosting Bundle 8.0 | 8.0.32 | [Microsoft ASP.NET Core Hosting Bundle 8.0 8.0.32](https://patchblox.com/security/data/fix/windows-app/microsoft.dotnet.hostingbundle.8-8.0.32.md) | Oct 5, 2026 | | Windows apps | Microsoft ASP.NET Core Hosting Bundle 9.0 | 9.0.21 | [Microsoft ASP.NET Core Hosting Bundle 9.0 9.0.21](https://patchblox.com/security/data/fix/windows-app/microsoft.dotnet.hostingbundle.9-9.0.21.md) | Oct 5, 2026 | ## No fix yet | Platform | Product | Status | |---|---|---| | Windows apps | Microsoft Windows Desktop Runtime - 8.0.25 (arm64) | no-fix | | Windows apps | Microsoft Windows Desktop Runtime - 8.0.25 (x64) | no-fix | | Windows apps | Microsoft Windows Desktop Runtime - 8.0.25 (x86) | no-fix | --- Data as of 2026-11-09T07:25:28Z UTC. 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