# CVE-2026-70197: .NET and Visual Studio Remote Code Execution Vulnerability

CVE-2026-70197 is fixed in 79 products on 3 platforms, first by Microsoft .NET Windows Desktop Runtime 10.0 10.0.13, released October 4, 2026. 3 other affected products have no fix yet. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-70197
- Priority: High
- CVSS: 8.1 (Important)
- EPSS: 0.0079
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Less Likely
- Published: Oct 13, 2026
- Weakness: Out-of-bounds Write
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70197

## Description

<p>Out-of-bounds write in .NET allows an unauthorized attacker to execute code over a network.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | .NET 10.0 installed on Linux |  | [KB5133966](https://patchblox.com/security/data/fix/microsoft/kb5133966.md) | Oct 25, 2026 |
| Microsoft | .NET 10.0 installed on Mac OS |  | [KB5133966](https://patchblox.com/security/data/fix/microsoft/kb5133966.md) | Oct 25, 2026 |
| Microsoft | .NET 10.0 installed on Windows |  | [KB5133966](https://patchblox.com/security/data/fix/microsoft/kb5133966.md) | Oct 25, 2026 |
| Microsoft | .NET 10.0 runtime installed on Windows |  | [KB5130036](https://patchblox.com/security/data/fix/microsoft/kb5130036.md) | Oct 13, 2026 |
| Microsoft | .NET 8.0 installed on Linux |  | [KB5133964](https://patchblox.com/security/data/fix/microsoft/kb5133964.md) | Oct 25, 2026 |
| Microsoft | .NET 8.0 installed on Mac OS |  | [KB5133964](https://patchblox.com/security/data/fix/microsoft/kb5133964.md) | Oct 25, 2026 |
| Microsoft | .NET 8.0 installed on Windows |  | [KB5133964](https://patchblox.com/security/data/fix/microsoft/kb5133964.md) | Oct 25, 2026 |
| 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 installed on Linux |  | [KB5133965](https://patchblox.com/security/data/fix/microsoft/kb5133965.md) | Oct 25, 2026 |
| Microsoft | .NET 9.0 installed on Mac OS |  | [KB5133965](https://patchblox.com/security/data/fix/microsoft/kb5133965.md) | Oct 25, 2026 |
| Microsoft | .NET 9.0 installed on Windows |  | [KB5133965](https://patchblox.com/security/data/fix/microsoft/kb5133965.md) | Oct 25, 2026 |
| Microsoft | .NET 9.0 runtime installed on Windows |  | [KB5130035](https://patchblox.com/security/data/fix/microsoft/kb5130035.md) | Oct 13, 2026 |
| Windows apps | Microsoft .NET Windows Desktop Runtime 10.0 | 10.0.13 | [Microsoft .NET Windows Desktop Runtime 10.0 10.0.13](https://patchblox.com/security/data/fix/windows-app/microsoft.dotnet.desktopruntime.10-10.0.13.md) | Oct 4, 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 | 10.0.13 | [Microsoft ASP.NET Core Hosting Bundle 10.0 10.0.13](https://patchblox.com/security/data/fix/windows-app/microsoft.dotnet.hostingbundle.10-10.0.13.md) | Oct 5, 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 |
| Linux | aspnetcore-runtime-10.0 amzn 2023 | 10.0.14-1.amzn2023.0.1 | [ALAS2023-2026-3366](https://patchblox.com/security/data/fix/linux/alas2023-2026-3366.md) | Nov 7, 2026 |
| Linux | aspnetcore-runtime-8.0 amzn 2023 | 8.0.33-1.amzn2023.0.1 | [ALAS2023-2026-3367](https://patchblox.com/security/data/fix/linux/alas2023-2026-3367.md) | Nov 7, 2026 |
| Linux | aspnetcore-runtime-9.0 amzn 2023 | 9.0.22-1.amzn2023.0.1 | [ALAS2023-2026-3374](https://patchblox.com/security/data/fix/linux/alas2023-2026-3374.md) | Nov 7, 2026 |
| Linux | aspnetcore-runtime-dbg-10.0 amzn 2023 | 10.0.14-1.amzn2023.0.1 | [ALAS2023-2026-3366](https://patchblox.com/security/data/fix/linux/alas2023-2026-3366.md) | Nov 7, 2026 |
| Linux | aspnetcore-runtime-dbg-8.0 amzn 2023 | 8.0.33-1.amzn2023.0.1 | [ALAS2023-2026-3367](https://patchblox.com/security/data/fix/linux/alas2023-2026-3367.md) | Nov 7, 2026 |
| Linux | aspnetcore-runtime-dbg-9.0 amzn 2023 | 9.0.22-1.amzn2023.0.1 | [ALAS2023-2026-3374](https://patchblox.com/security/data/fix/linux/alas2023-2026-3374.md) | Nov 7, 2026 |
| Linux | aspnetcore-targeting-pack-10.0 amzn 2023 | 10.0.14-1.amzn2023.0.1 | [ALAS2023-2026-3366](https://patchblox.com/security/data/fix/linux/alas2023-2026-3366.md) | Nov 7, 2026 |
| Linux | aspnetcore-targeting-pack-8.0 amzn 2023 | 8.0.33-1.amzn2023.0.1 | [ALAS2023-2026-3367](https://patchblox.com/security/data/fix/linux/alas2023-2026-3367.md) | Nov 7, 2026 |
| Linux | aspnetcore-targeting-pack-9.0 amzn 2023 | 9.0.22-1.amzn2023.0.1 | [ALAS2023-2026-3374](https://patchblox.com/security/data/fix/linux/alas2023-2026-3374.md) | Nov 7, 2026 |
| Linux | dotnet amzn 2023 | 9.0.123-1.amzn2023.0.1 | [ALAS2023-2026-3374](https://patchblox.com/security/data/fix/linux/alas2023-2026-3374.md) | Nov 7, 2026 |
| Linux | dotnet-apphost-pack-10.0 amzn 2023 | 10.0.14-1.amzn2023.0.1 | [ALAS2023-2026-3366](https://patchblox.com/security/data/fix/linux/alas2023-2026-3366.md) | Nov 7, 2026 |
| Linux | dotnet-apphost-pack-10.0-debuginfo amzn 2023 | 10.0.14-1.amzn2023.0.1 | [ALAS2023-2026-3366](https://patchblox.com/security/data/fix/linux/alas2023-2026-3366.md) | Nov 7, 2026 |
| Linux | dotnet-apphost-pack-8.0 amzn 2023 | 8.0.33-1.amzn2023.0.1 | [ALAS2023-2026-3367](https://patchblox.com/security/data/fix/linux/alas2023-2026-3367.md) | Nov 7, 2026 |
| Linux | dotnet-apphost-pack-8.0-debuginfo amzn 2023 | 8.0.33-1.amzn2023.0.1 | [ALAS2023-2026-3367](https://patchblox.com/security/data/fix/linux/alas2023-2026-3367.md) | Nov 7, 2026 |
| Linux | dotnet-apphost-pack-9.0 amzn 2023 | 9.0.22-1.amzn2023.0.1 | [ALAS2023-2026-3374](https://patchblox.com/security/data/fix/linux/alas2023-2026-3374.md) | Nov 7, 2026 |
| Linux | dotnet-apphost-pack-9.0-debuginfo amzn 2023 | 9.0.22-1.amzn2023.0.1 | [ALAS2023-2026-3374](https://patchblox.com/security/data/fix/linux/alas2023-2026-3374.md) | Nov 7, 2026 |
| Linux | dotnet-host amzn 2023 | 9.0.22-1.amzn2023.0.1 | [ALAS2023-2026-3374](https://patchblox.com/security/data/fix/linux/alas2023-2026-3374.md) | Nov 7, 2026 |
| Linux | dotnet-host-debuginfo amzn 2023 | 9.0.22-1.amzn2023.0.1 | [ALAS2023-2026-3374](https://patchblox.com/security/data/fix/linux/alas2023-2026-3374.md) | Nov 7, 2026 |
| Linux | dotnet-hostfxr-10.0 amzn 2023 | 10.0.14-1.amzn2023.0.1 | [ALAS2023-2026-3366](https://patchblox.com/security/data/fix/linux/alas2023-2026-3366.md) | Nov 7, 2026 |
| Linux | dotnet-hostfxr-10.0-debuginfo amzn 2023 | 10.0.14-1.amzn2023.0.1 | [ALAS2023-2026-3366](https://patchblox.com/security/data/fix/linux/alas2023-2026-3366.md) | Nov 7, 2026 |
| Linux | dotnet-hostfxr-8.0 amzn 2023 | 8.0.33-1.amzn2023.0.1 | [ALAS2023-2026-3367](https://patchblox.com/security/data/fix/linux/alas2023-2026-3367.md) | Nov 7, 2026 |
| Linux | dotnet-hostfxr-8.0-debuginfo amzn 2023 | 8.0.33-1.amzn2023.0.1 | [ALAS2023-2026-3367](https://patchblox.com/security/data/fix/linux/alas2023-2026-3367.md) | Nov 7, 2026 |
| Linux | dotnet-hostfxr-9.0 amzn 2023 | 9.0.22-1.amzn2023.0.1 | [ALAS2023-2026-3374](https://patchblox.com/security/data/fix/linux/alas2023-2026-3374.md) | Nov 7, 2026 |
| Linux | dotnet-hostfxr-9.0-debuginfo amzn 2023 | 9.0.22-1.amzn2023.0.1 | [ALAS2023-2026-3374](https://patchblox.com/security/data/fix/linux/alas2023-2026-3374.md) | Nov 7, 2026 |
| Linux | dotnet-runtime-10.0 amzn 2023 | 10.0.14-1.amzn2023.0.1 | [ALAS2023-2026-3366](https://patchblox.com/security/data/fix/linux/alas2023-2026-3366.md) | Nov 7, 2026 |
| Linux | dotnet-runtime-10.0-debuginfo amzn 2023 | 10.0.14-1.amzn2023.0.1 | [ALAS2023-2026-3366](https://patchblox.com/security/data/fix/linux/alas2023-2026-3366.md) | Nov 7, 2026 |
| Linux | dotnet-runtime-8.0 amzn 2023 | 8.0.33-1.amzn2023.0.1 | [ALAS2023-2026-3367](https://patchblox.com/security/data/fix/linux/alas2023-2026-3367.md) | Nov 7, 2026 |
| Linux | dotnet-runtime-8.0-debuginfo amzn 2023 | 8.0.33-1.amzn2023.0.1 | [ALAS2023-2026-3367](https://patchblox.com/security/data/fix/linux/alas2023-2026-3367.md) | Nov 7, 2026 |
| Linux | dotnet-runtime-9.0 amzn 2023 | 9.0.22-1.amzn2023.0.1 | [ALAS2023-2026-3374](https://patchblox.com/security/data/fix/linux/alas2023-2026-3374.md) | Nov 7, 2026 |
| Linux | dotnet-runtime-9.0-debuginfo amzn 2023 | 9.0.22-1.amzn2023.0.1 | [ALAS2023-2026-3374](https://patchblox.com/security/data/fix/linux/alas2023-2026-3374.md) | Nov 7, 2026 |
| Linux | dotnet-runtime-dbg-10.0 amzn 2023 | 10.0.14-1.amzn2023.0.1 | [ALAS2023-2026-3366](https://patchblox.com/security/data/fix/linux/alas2023-2026-3366.md) | Nov 7, 2026 |
| Linux | dotnet-runtime-dbg-8.0 amzn 2023 | 8.0.33-1.amzn2023.0.1 | [ALAS2023-2026-3367](https://patchblox.com/security/data/fix/linux/alas2023-2026-3367.md) | Nov 7, 2026 |
| Linux | dotnet-runtime-dbg-9.0 amzn 2023 | 9.0.22-1.amzn2023.0.1 | [ALAS2023-2026-3374](https://patchblox.com/security/data/fix/linux/alas2023-2026-3374.md) | Nov 7, 2026 |
| Linux | dotnet-sdk-10.0 amzn 2023 | 10.0.114-1.amzn2023.0.1 | [ALAS2023-2026-3366](https://patchblox.com/security/data/fix/linux/alas2023-2026-3366.md) | Nov 7, 2026 |
| Linux | dotnet-sdk-10.0-debuginfo amzn 2023 | 10.0.114-1.amzn2023.0.1 | [ALAS2023-2026-3366](https://patchblox.com/security/data/fix/linux/alas2023-2026-3366.md) | Nov 7, 2026 |
| Linux | dotnet-sdk-10.0-source-built-artifacts amzn 2023 | 10.0.114-1.amzn2023.0.1 | [ALAS2023-2026-3366](https://patchblox.com/security/data/fix/linux/alas2023-2026-3366.md) | Nov 7, 2026 |
| Linux | dotnet-sdk-8.0 amzn 2023 | 8.0.133-1.amzn2023.0.1 | [ALAS2023-2026-3367](https://patchblox.com/security/data/fix/linux/alas2023-2026-3367.md) | Nov 7, 2026 |
| Linux | dotnet-sdk-8.0-debuginfo amzn 2023 | 8.0.133-1.amzn2023.0.1 | [ALAS2023-2026-3367](https://patchblox.com/security/data/fix/linux/alas2023-2026-3367.md) | Nov 7, 2026 |
| Linux | dotnet-sdk-8.0-source-built-artifacts amzn 2023 | 8.0.133-1.amzn2023.0.1 | [ALAS2023-2026-3367](https://patchblox.com/security/data/fix/linux/alas2023-2026-3367.md) | Nov 7, 2026 |
| Linux | dotnet-sdk-9.0 amzn 2023 | 9.0.123-1.amzn2023.0.1 | [ALAS2023-2026-3374](https://patchblox.com/security/data/fix/linux/alas2023-2026-3374.md) | Nov 7, 2026 |
| Linux | dotnet-sdk-9.0-debuginfo amzn 2023 | 9.0.123-1.amzn2023.0.1 | [ALAS2023-2026-3374](https://patchblox.com/security/data/fix/linux/alas2023-2026-3374.md) | Nov 7, 2026 |
| Linux | dotnet-sdk-9.0-source-built-artifacts amzn 2023 | 9.0.123-1.amzn2023.0.1 | [ALAS2023-2026-3374](https://patchblox.com/security/data/fix/linux/alas2023-2026-3374.md) | Nov 7, 2026 |
| Linux | dotnet-sdk-aot-10.0 amzn 2023 | 10.0.114-1.amzn2023.0.1 | [ALAS2023-2026-3366](https://patchblox.com/security/data/fix/linux/alas2023-2026-3366.md) | Nov 7, 2026 |
| Linux | dotnet-sdk-aot-10.0-debuginfo amzn 2023 | 10.0.114-1.amzn2023.0.1 | [ALAS2023-2026-3366](https://patchblox.com/security/data/fix/linux/alas2023-2026-3366.md) | Nov 7, 2026 |
| Linux | dotnet-sdk-aot-9.0 amzn 2023 | 9.0.123-1.amzn2023.0.1 | [ALAS2023-2026-3374](https://patchblox.com/security/data/fix/linux/alas2023-2026-3374.md) | Nov 7, 2026 |
| Linux | dotnet-sdk-aot-9.0-debuginfo amzn 2023 | 9.0.123-1.amzn2023.0.1 | [ALAS2023-2026-3374](https://patchblox.com/security/data/fix/linux/alas2023-2026-3374.md) | Nov 7, 2026 |
| Linux | dotnet-sdk-dbg-10.0 amzn 2023 | 10.0.114-1.amzn2023.0.1 | [ALAS2023-2026-3366](https://patchblox.com/security/data/fix/linux/alas2023-2026-3366.md) | Nov 7, 2026 |
| Linux | dotnet-sdk-dbg-8.0 amzn 2023 | 8.0.133-1.amzn2023.0.1 | [ALAS2023-2026-3367](https://patchblox.com/security/data/fix/linux/alas2023-2026-3367.md) | Nov 7, 2026 |
| Linux | dotnet-sdk-dbg-9.0 amzn 2023 | 9.0.123-1.amzn2023.0.1 | [ALAS2023-2026-3374](https://patchblox.com/security/data/fix/linux/alas2023-2026-3374.md) | Nov 7, 2026 |
| Linux | dotnet-targeting-pack-10.0 amzn 2023 | 10.0.14-1.amzn2023.0.1 | [ALAS2023-2026-3366](https://patchblox.com/security/data/fix/linux/alas2023-2026-3366.md) | Nov 7, 2026 |
| Linux | dotnet-targeting-pack-8.0 amzn 2023 | 8.0.33-1.amzn2023.0.1 | [ALAS2023-2026-3367](https://patchblox.com/security/data/fix/linux/alas2023-2026-3367.md) | Nov 7, 2026 |
| Linux | dotnet-targeting-pack-9.0 amzn 2023 | 9.0.22-1.amzn2023.0.1 | [ALAS2023-2026-3374](https://patchblox.com/security/data/fix/linux/alas2023-2026-3374.md) | Nov 7, 2026 |
| Linux | dotnet-templates-10.0 amzn 2023 | 10.0.114-1.amzn2023.0.1 | [ALAS2023-2026-3366](https://patchblox.com/security/data/fix/linux/alas2023-2026-3366.md) | Nov 7, 2026 |
| Linux | dotnet-templates-8.0 amzn 2023 | 8.0.133-1.amzn2023.0.1 | [ALAS2023-2026-3367](https://patchblox.com/security/data/fix/linux/alas2023-2026-3367.md) | Nov 7, 2026 |
| Linux | dotnet-templates-9.0 amzn 2023 | 9.0.123-1.amzn2023.0.1 | [ALAS2023-2026-3374](https://patchblox.com/security/data/fix/linux/alas2023-2026-3374.md) | Nov 7, 2026 |
| Linux | dotnet10.0-debuginfo amzn 2023 | 10.0.114-1.amzn2023.0.1 | [ALAS2023-2026-3366](https://patchblox.com/security/data/fix/linux/alas2023-2026-3366.md) | Nov 7, 2026 |
| Linux | dotnet10.0-debugsource amzn 2023 | 10.0.114-1.amzn2023.0.1 | [ALAS2023-2026-3366](https://patchblox.com/security/data/fix/linux/alas2023-2026-3366.md) | Nov 7, 2026 |
| Linux | dotnet8.0-debuginfo amzn 2023 | 8.0.133-1.amzn2023.0.1 | [ALAS2023-2026-3367](https://patchblox.com/security/data/fix/linux/alas2023-2026-3367.md) | Nov 7, 2026 |
| Linux | dotnet8.0-debugsource amzn 2023 | 8.0.133-1.amzn2023.0.1 | [ALAS2023-2026-3367](https://patchblox.com/security/data/fix/linux/alas2023-2026-3367.md) | Nov 7, 2026 |
| Linux | dotnet9.0-debugsource amzn 2023 | 9.0.123-1.amzn2023.0.1 | [ALAS2023-2026-3374](https://patchblox.com/security/data/fix/linux/alas2023-2026-3374.md) | Nov 7, 2026 |
| Linux | netstandard-targeting-pack-2.1 amzn 2023 | 9.0.123-1.amzn2023.0.1 | [ALAS2023-2026-3374](https://patchblox.com/security/data/fix/linux/alas2023-2026-3374.md) | Nov 7, 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 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

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