Vulnerability · Published Oct 13, 2026 · Assigned by microsoft
CVE-2026-70174.NET Remote Code Execution Vulnerability
High 8.8
In plain English
A high-severity security flaw in Microsoft .NET Framework 3.5 from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 60% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.9%top 39.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Improperly implemented security check for standard in .NET allows an unauthorized attacker to execute code over a network.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.23 | dotnet10-runtime | 10.0.13-r0 | ALPINE-CVE-2026-70174 |
| Alpine:v3.24 | dotnet10-runtime | 10.0.13-r0 | ALPINE-CVE-2026-70174 |
| Alpine:v3.22 | dotnet8-runtime | 8.0.32-r0 | ALPINE-CVE-2026-70174 |
| Alpine:v3.23 | dotnet8-runtime | 8.0.32-r0 | ALPINE-CVE-2026-70174 |
| Alpine:v3.24 | dotnet8-runtime | 8.0.32-r0 | ALPINE-CVE-2026-70174 |
| Alpine:v3.22 | dotnet9-runtime | 9.0.21-r0 | ALPINE-CVE-2026-70174 |
| Alpine:v3.23 | dotnet9-runtime | 9.0.21-r0 | ALPINE-CVE-2026-70174 |
| Alpine:v3.24 | dotnet9-runtime | 9.0.21-r0 | ALPINE-CVE-2026-70174 |
| NuGet | microsoft.windowsdesktop.app.runtime.win-arm64 | 10.0.13 | GHSA-f749-vhgx-39h6 |
| NuGet | microsoft.windowsdesktop.app.runtime.win-arm64 | 11.0.0-rc.2 | GHSA-f749-vhgx-39h6 |
| NuGet | microsoft.windowsdesktop.app.runtime.win-arm64 | 8.0.32 | GHSA-f749-vhgx-39h6 |
| NuGet | microsoft.windowsdesktop.app.runtime.win-arm64 | 9.0.21 | GHSA-f749-vhgx-39h6 |
| NuGet | microsoft.windowsdesktop.app.runtime.win-x64 | 10.0.13 | GHSA-f749-vhgx-39h6 |
| NuGet | microsoft.windowsdesktop.app.runtime.win-x64 | 9.0.21 | GHSA-f749-vhgx-39h6 |
| NuGet | microsoft.windowsdesktop.app.runtime.win-x64 | 11.0.0-rc.2 | GHSA-f749-vhgx-39h6 |
| NuGet | microsoft.windowsdesktop.app.runtime.win-x64 | 8.0.32 | GHSA-f749-vhgx-39h6 |
| NuGet | microsoft.windowsdesktop.app.runtime.win-x86 | 11.0.0-rc.2 | GHSA-f749-vhgx-39h6 |
| NuGet | microsoft.windowsdesktop.app.runtime.win-x86 | 8.0.32 | GHSA-f749-vhgx-39h6 |
| NuGet | microsoft.windowsdesktop.app.runtime.win-x86 | 9.0.21 | GHSA-f749-vhgx-39h6 |
| NuGet | microsoft.windowsdesktop.app.runtime.win-x86 | 10.0.13 | GHSA-f749-vhgx-39h6 |
| Ubuntu:22.04:LTS | dotnet7 | no fix listed | UBUNTU-CVE-2026-70174 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | .NET 10.0 runtime | 10.0.0 – before 10.0.13 |
| Microsoft | .NET 11.0 runtime | 11.0.0 – before 11.0.0-rc.2 |
| Microsoft | .NET 8.0 runtime | 8.0.0 – before 8.0.32 |
| Microsoft | .NET 9.0 runtime | 9.0.0 – before 9.0.21 |
| Microsoft | Microsoft .NET Framework 3.5 | 3.5.0 – before 2.0.50727.9188 AND 3.0.30729.9171 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 | 3.0.0.0 – before 2.0.50727.8987 AND 3.0.30729.8982 AND 4.7.4150.0 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.7.2 | 4.7.0 – before 2.0.50727.9073 AND 3.0.30729.9070 AND 4.7.4150.0 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.8 | 4.8.0 – before 2.0.50727.9073 AND 3.0.30729.9070 AND 4.8.4811.0 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.8.1 | 4.8.1 – before 2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0 |
| Microsoft | Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 | 4.7.0 – before 4.7.4150.0 |
| Microsoft | Microsoft .NET Framework 4.8 | 4.8.0 – before 4.8.4811.0 |
| Microsoft | Microsoft .NET Framework 4.8.1 | 4.8.0.0 – before 4.8.9363.0 |
| Microsoft | Microsoft Visual Studio 2022 version 17.14 | 17.14.0 – before 17.14.42 |
| Microsoft | Microsoft Visual Studio 2026 version 18.10 | 18.10.0 – before 18.10.4 |
Weakness: CWE-358 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
References
- .NET Remote Code Execution Vulnerability vendor-advisory, patch