CVE-2026-26131: .NET Elevation of Privilege Vulnerability

Overview

Severity

High (CVSS 7.8)

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Category

Elevation of Privilege

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2026-Mar

Released

2026-03-10

EPSS Score

0.04% (percentile: 12.6%)

Description

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

FAQ

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.

Affected Products (1)

Developer Tools

• .NET 10.0 installed on Linux

Security Updates (1)

• 5081276

Acknowledgments

<a href="https://www.linkedin.com/in/igorkovalchuk/">Igor Kovalchuk</a>

Revision History

• 2026-03-10: Information published.