MSRC-CVE-2026-96230 — ASP.NET Core Remote Code Execution Vulnerability

Summary

Impact: Remote Code Execution. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

Details

How could an attacker exploit this vulnerability?
An unauthenticated attacker could host a specially crafted web page and convince a developer to visit it. The page could send requests to a vulnerable development server running on the developer's system, and successful exploitation could allow the attacker to execute code in the developer's context. User interaction is required.

Security updates
10.0.13 — https://github.com/dotnet/announcements/issues/478
18.10.4 — https://learn.microsoft.com/en-us/visualstudio/releases/2026/release-notes
17.14.42 — https://learn.microsoft.com/en-us/visualstudio/releases/2022/release-notes

Vulnerabilities 1

High 8.8

CVE-2026-96230 Public exploit

ASP.NET Core Remote Code Execution Vulnerability

Improper neutralization of input during web page generation ('cross-site scripting') in ASP.NET Core allows an unauthorized attacker to execute code over a network.

Microsoft Microsoft Visual Studio 2022 version 17.14 Microsoft Visual Studio 2026 version 18.10 Microsoft.AspNetCore.Components.WebAssembly.Server Ubuntu Alpine NuGet

Oct 13, 2026

Revision history

2026-10-13 #1
Information published.

References

CVE-2026-96230 ASP.NET Core Remote Code Execution Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96230
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