CVE-2026-26131
High
Description
Incorrect default permissions in .NET allows an authorized attacker to elevate privileges locally.
SeverityHigh
CVSS7.8
Exploit probability—
Product
Microsoft .net
PublishedMar 10, 2026
First seenMar 10, 2026
Weakness typeCWE-276CWE-276
How to fix
Update
- microsoft .net10.0.4 or later
- Microsoft.NetCore.App.Runtime.linux-arm10.0.4 or later
- Microsoft.NetCore.App.Runtime.linux-arm6410.0.4 or later
- Microsoft.NetCore.App.Runtime.linux-musl-arm10.0.4 or later
- Microsoft.NetCore.App.Runtime.linux-musl-arm6410.0.4 or later
- Microsoft.NetCore.App.Runtime.linux-musl-x6410.0.4 or later
- Microsoft.NetCore.App.Runtime.linux-x6410.0.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft .net | 10.0.0 ≤ v < 10.0.4 | 10.0.4 |
| Microsoft.NetCore.App.Runtime.linux-armNuGet | 10.0.0 ≤ v < 10.0.4 | 10.0.4 |
| Microsoft.NetCore.App.Runtime.linux-arm64NuGet | 10.0.0 ≤ v < 10.0.4 | 10.0.4 |
| Microsoft.NetCore.App.Runtime.linux-musl-armNuGet | 10.0.0 ≤ v < 10.0.4 | 10.0.4 |
| Microsoft.NetCore.App.Runtime.linux-musl-arm64NuGet | 10.0.0 ≤ v < 10.0.4 | 10.0.4 |
| Microsoft.NetCore.App.Runtime.linux-musl-x64NuGet | 10.0.0 ≤ v < 10.0.4 | 10.0.4 |
| Microsoft.NetCore.App.Runtime.linux-x64NuGet | 10.0.0 ≤ v < 10.0.4 | 10.0.4 |
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