CVE-2026-105544

.NET Elevation of Privilege Vulnerability

CVE-2026-105544 is fixed in 9 products on 1 platform, first by KB5135241, released November 10, 2026. It is not reported as exploited. Patch Radar priority: High.

High

CVSS

7.5

Important

Exploitation

None reported

Exploitation Less Likely

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

n/a

<p>Improper access control in .NET allows an authorized attacker to elevate privileges locally.</p>

Where it's fixed

Product	Fix	Released
Microsoft
.NET 10.0 installed on Linux	KB5135241	Nov 10, 2026
.NET 10.0 installed on Mac OS	KB5135241	Nov 10, 2026
.NET 10.0 installed on Windows	KB5135241	Nov 10, 2026
.NET 8.0 installed on Linux	KB5135243	Nov 10, 2026
.NET 8.0 installed on Mac OS	KB5135243	Nov 10, 2026
.NET 8.0 installed on Windows	KB5135243	Nov 10, 2026
.NET 9.0 installed on Linux	KB5135242	Nov 10, 2026
.NET 9.0 installed on Mac OS	KB5135242	Nov 10, 2026
.NET 9.0 installed on Windows	KB5135242	Nov 10, 2026

Details

Published
November 10, 2026
Weakness
External Control of System or Configuration Setting
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-105544

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