ASP.NET Core Denial of Service Vulnerability

Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely CVE-2026-114154 · score 7.5/10

What could go wrong?

An attacker could make a program or service crash or stop responding.

How urgent is it?

Check Microsoft’s page for details.

Who is affected?

Microsoft.AspNetCore.Server.HttpSys, .NET 8.0 installed on Windows, .NET 9.0 installed on Windows, .NET 10.0 installed on Windows, Microsoft Visual Studio 2022 version 17.14, Microsoft Visual Studio 2026 version 18.11, Microsoft Visual Studio 2026 version 18.12

What should I do?

Install this month’s updates via Windows Update, Intune or your update tool, then restart.

Known problems

Microsoft lists known issues per update: KB5135243, KB5135242, KB5135241. Official page.