What is CVE-2026-26131?

CVE-2026-26131 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. .NET Elevation of Privilege Vulnerability

Which CVE IDs does CVE-2026-26131 cover?

CVE-2026-26131 covers the following CVE IDs: CVE-2026-26131. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-26131?

CVE-2026-26131 has a CVSS v3 base score of 7.8, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-26131?

CVE-2026-26131 affects 1 product, including: .NET 10.0 installed on Linux.

CVE-2026-26131HighCVSS 7.8

.NET Elevation of Privilege Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

May 31, 2026

Last Modified

—

🔗 CVE IDs covered (1)

CVE-2026-26131 →

📋 Description

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

🎯 Affected products1

.NET 10.0 installed on Linux

✅ Remediation

KB5081276 (Security Update) — fixed build 10.0.4

🔗 References (3)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26131
patchhttps://dotnet.microsoft.com/download/dotnet/10.0
referencehttps://support.microsoft.com/help/5081276