CVE-2026-70174
.NET Remote Code Execution Vulnerability
CVE-2026-70174 is fixed in 36 products on 2 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.
HighFixed on 2 platforms
CVSS
8.8
Important
Exploitation
None reported
Exploitation Less Likely
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0091
60th percentile
<p>Improperly implemented security check for standard in .NET allows an unauthorized attacker to execute code over a network.</p>
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Microsoft | |||
| .NET 10.0 runtime installed on Windows | KB5130036 | Oct 13, 2026 | |
| .NET 8.0 runtime installed on Windows | KB5130034 | Oct 13, 2026 | |
| .NET 9.0 runtime installed on Windows | KB5130035 | Oct 13, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 version 1607 | 14393.9612 | KB5126868 | Oct 13, 2026 |
| Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016 | 14393.9612 | KB5126868 | Oct 13, 2026 |
| Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2019 | KB5127666 | Oct 13, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 version 1809 | KB5127666 | Oct 13, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 version 1809 | KB5127685 | Oct 13, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 version 21H2 | KB5127683 | Oct 13, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 version 22H2 | KB5127683 | Oct 13, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019 | KB5127685 | Oct 13, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2022 | KB5127687 | Oct 13, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 version 21H2 | KB5127689 | Oct 13, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 version 22H2 | KB5127689 | Oct 13, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 23H2 | KB5127692 | Oct 13, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 24H2 | KB5127690 | Oct 13, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 25H2 | KB5127690 | Oct 13, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 26H2 | KB5127694 | Oct 13, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2022 | KB5127693 | Oct 13, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2025 | KB5127690 | Oct 13, 2026 | |
| Microsoft .NET Framework 3.5 on Windows 11 version 26H1 | KB5127696 | Oct 13, 2026 | |
| Microsoft .NET Framework 3.5 on Windows Server 2012 | KB5127660 | Oct 13, 2026 | |
| Microsoft .NET Framework 3.5 on Windows Server 2012 R2 | KB5127664 | Oct 13, 2026 | |
| Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 | KB5127667 | Oct 13, 2026 | |
| Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 R2 | KB5127668 | Oct 13, 2026 | |
| Microsoft .NET Framework 4.8 on Windows 10 version 1607 | KB5127684 | Oct 13, 2026 | |
| Microsoft .NET Framework 4.8 on Windows Server 2012 | KB5127686 | Oct 13, 2026 | |
| Microsoft .NET Framework 4.8 on Windows Server 2012 R2 | KB5127688 | Oct 13, 2026 | |
| Microsoft .NET Framework 4.8 on Windows Server 2016 | KB5127684 | Oct 13, 2026 | |
| Microsoft .NET Framework 4.8.1 on Windows 11 version 26H1 | KB5127691 | 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 | Oct 4, 2026 |
| Microsoft .NET Windows Desktop Runtime 8.0 | 8.0.32 | Microsoft .NET Windows Desktop Runtime 8.0 8.0.32 | Oct 5, 2026 |
| Microsoft .NET Windows Desktop Runtime 9.0 | 9.0.21 | Microsoft .NET Windows Desktop Runtime 9.0 9.0.21 | Oct 5, 2026 |
| Microsoft ASP.NET Core Hosting Bundle 10.0 | 10.0.13 | Microsoft ASP.NET Core Hosting Bundle 10.0 10.0.13 | Oct 5, 2026 |
| Microsoft ASP.NET Core Hosting Bundle 8.0 | 8.0.32 | Microsoft ASP.NET Core Hosting Bundle 8.0 8.0.32 | Oct 5, 2026 |
| Microsoft ASP.NET Core Hosting Bundle 9.0 | 9.0.21 | Microsoft ASP.NET Core Hosting Bundle 9.0 9.0.21 | Oct 5, 2026 |
| No fix yet | |||
| Microsoft Windows Desktop Runtime - 8.0.25 (arm64) (Windows apps) | No fix yet | no-fix | n/a |
| Microsoft Windows Desktop Runtime - 8.0.25 (x64) (Windows apps) | No fix yet | no-fix | n/a |
| Microsoft Windows Desktop Runtime - 8.0.25 (x86) (Windows apps) | No fix yet | no-fix | n/a |
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