MSRC-CVE-2026-26131 — .NET Elevation of Privilege Vulnerability

Summary

Impact: Elevation of Privilege. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

Details

What privileges could be gained by an attacker who successfully exploited this vulnerability?
An attacker who successfully exploited this vulnerability could gain the highest privileges on the system.

Security updates
10.0.4 — https://support.microsoft.com/help/5081276

Vulnerabilities 1

High 7.8

CVE-2026-26131

.NET Elevation of Privilege Vulnerability

Incorrect default permissions in .NET allows an authorized attacker to elevate privileges locally.

Microsoft .NET 10.0 dotnet7 dotnet10-runtime Ubuntu Alpine NuGet

Mar 10, 2026

Revision history

2026-03-10 #1
Information published.

References

CVE-2026-26131 .NET Elevation of Privilege Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26131
Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
Common Vulnerability Scoring System
https://www.first.org/cvss