CVE-2026-70354
High
Description
Out-of-bounds write in .NET allows an unauthorized attacker to execute code locally.
SeverityHigh
CVSS7.8
Exploit probability—
Product
Microsoft .net Framework
PublishedAug 11, 2026
First seenAug 11, 2026
Weakness typeCWE-787Out-of-bounds write
How to fix
Update
- microsoft visual_studio_202217.14.38 or later
- microsoft visual_studio_202618.8.3 or later
- microsoft .net8.0.30, 9.0.19, 10.0.11 or later
- Microsoft.WindowsDesktop.App.Runtime.win-arm6410.0.11, 9.0.19, 8.0.30 or later
- Microsoft.WindowsDesktop.App.Runtime.win-x6410.0.11, 9.0.19, 8.0.30 or later
- Microsoft.WindowsDesktop.App.Runtime.win-x8610.0.11, 9.0.19, 8.0.30 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft .net_framework | 4.8.1, 4.8, 4.6.2, 4.7, 4.7.1, 4.7.2, 3.5 | — |
| microsoft visual_studio_2022 | 17.14.0 ≤ v < 17.14.38 | 17.14.38 |
| microsoft visual_studio_2026 | 18.8.0 ≤ v < 18.8.3 | 18.8.3 |
| microsoft .net | 8.0.0 ≤ v < 8.0.30, 9.0.0 ≤ v < 9.0.19, 10.0.0 ≤ v < 10.0.11 | 8.0.30, 9.0.19, 10.0.11 |
| Microsoft.WindowsDesktop.App.Runtime.win-arm64NuGet | 10.0.0 ≤ v < 10.0.11, 9.0.0 ≤ v < 9.0.19, 8.0.0 ≤ v < 8.0.30 | 10.0.11, 9.0.19, 8.0.30 |
| Microsoft.WindowsDesktop.App.Runtime.win-x64NuGet | 10.0.0 ≤ v < 10.0.11, 9.0.0 ≤ v < 9.0.19, 8.0.0 ≤ v < 8.0.30 | 10.0.11, 9.0.19, 8.0.30 |
| Microsoft.WindowsDesktop.App.Runtime.win-x86NuGet | 10.0.0 ≤ v < 10.0.11, 9.0.0 ≤ v < 9.0.19, 8.0.0 ≤ v < 8.0.30 | 10.0.11, 9.0.19, 8.0.30 |
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