Description
Improper input validation in .NET allows an unauthorized attacker to elevate privileges locally.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Microsoft | .NET 10.0 | 10.0.0 – < 10.0.8 | 10.0.8 |
| Microsoft | .NET 8.0 | 8.0.0 – < 8.0.27 | 8.0.27 |
| Microsoft | .NET 9.0 | 9.0.0 – < 9.0.16 | 9.0.16 |
| Microsoft | Microsoft .NET Framework 3.5 | 3.5.0 – < 4.8.9334.0 and 4.8.4802.0 | 4.8.9334.0 and 4.8.4802.0 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.7.2 | 4.7.0 – < 4.8.9334.0 and 4.8.4802.0 | 4.8.9334.0 and 4.8.4802.0 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.8 | 4.8.0 – < 4.8.9334.0 and 4.8.4802.0 | 4.8.9334.0 and 4.8.4802.0 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.8.1 | 4.8.1 – < 4.8.9334.0 and 4.8.4802.0 | 4.8.9334.0 and 4.8.4802.0 |
| Microsoft | Microsoft .NET Framework 4.8 | 4.8.0 – < 4.8.9334.0 and 4.8.4802.0 | 4.8.9334.0 and 4.8.4802.0 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | dotnet7 | No fix yet | — |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | dotnet10-runtime | 10.0.8-r0 | — |
| Alpine v3.24 | dotnet8-runtime | 8.0.27-r0 | — |
| Alpine v3.24 | dotnet9-runtime | 9.0.16-r0 | — |
| Alpine v3.23 | dotnet10-runtime | 10.0.8-r0 | — |
| Alpine v3.23 | dotnet8-runtime | 8.0.27-r0 | — |
| Alpine v3.23 | dotnet9-runtime | 9.0.16-r0 | — |
| Alpine v3.22 | dotnet8-runtime | 8.0.27-r0 | — |
| Alpine v3.22 | dotnet9-runtime | 9.0.16-r0 | — |
| Alpine v3.21 | dotnet8-runtime | 8.0.27-r0 | — |
| Alpine v3.21 | dotnet9-runtime | 9.0.16-r0 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| NuGet | Microsoft.WindowsDesktop.App.Runtime.win-arm64 | >= 8.0.0, < 8.0.27 | 8.0.27 | GHSA-8x9c-mqxv-q2pp |
| NuGet | Microsoft.WindowsDesktop.App.Runtime.win-arm64 | >= 9.0.0, < 9.0.16 | 9.0.16 | GHSA-8x9c-mqxv-q2pp |
| NuGet | Microsoft.WindowsDesktop.App.Runtime.win-arm64 | >= 10.0.0, < 10.0.8 | 10.0.8 | GHSA-8x9c-mqxv-q2pp |
| NuGet | Microsoft.WindowsDesktop.App.Runtime.win-x64 | >= 8.0.0, < 8.0.27 | 8.0.27 | GHSA-8x9c-mqxv-q2pp |
| NuGet | Microsoft.WindowsDesktop.App.Runtime.win-x64 | >= 9.0.0, < 9.0.16 | 9.0.16 | GHSA-8x9c-mqxv-q2pp |
| NuGet | Microsoft.WindowsDesktop.App.Runtime.win-x64 | >= 10.0.0, < 10.0.8 | 10.0.8 | GHSA-8x9c-mqxv-q2pp |
| NuGet | Microsoft.WindowsDesktop.App.Runtime.win-x86 | >= 8.0.0, < 8.0.27 | 8.0.27 | GHSA-8x9c-mqxv-q2pp |
| NuGet | Microsoft.WindowsDesktop.App.Runtime.win-x86 | >= 9.0.0, < 9.0.16 | 9.0.16 | GHSA-8x9c-mqxv-q2pp |
| NuGet | Microsoft.WindowsDesktop.App.Runtime.win-x86 | >= 10.0.0, < 10.0.8 | 10.0.8 | GHSA-8x9c-mqxv-q2pp |
Advisories 3
- WID-SEC-2026-1488 Microsoft Developer Tools: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jul 27, 2026
- MSRC-CVE-2026-35433 .NET Elevation of Privilege Vulnerability Microsoft Security Response Center · Jun 17, 2026
- NCSC-2026-0143 Kwetsbaarheden verholpen in Microsoft Developer Tools NCSC-NL (Netherlands) · May 12, 2026
References
- .NET Elevation of Privilege Vulnerability vendor-advisory patch