CVE-2026-102870

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Code Injection Vulnerability in ASP.NET Core

Publication date: 2026-10-13

Last updated on: 2026-10-13

Assigner: Microsoft Corporation

Description

Improper control of generation of code ('code injection') in ASP.NET Core allows an unauthorized attacker to execute code over a network.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-10-13

Last Modified

2026-10-13

Generated

2026-10-14

AI Q&A

2026-10-14

EPSS Evaluated

N/A

NVD

CVE-2026-102870

EUVD

EUVD-2026-100325

Affected Vendors & Products

Vendor	Product	Version / Range
Microsoft	Microsoft	Visual Studio 2022 version 17.14 17.14.0
Microsoft	Microsoft	Visual Studio 2026 version 18.10 18.10.0
Microsoft	Microsoft.AspNetCore.Components.WebAssembly.Server	10.0.0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-94	The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.

Attack-Flow Graph

Executive Summary

This is a code injection vulnerability in ASP.NET Core where an unauthorized attacker can execute arbitrary code over a network. It occurs due to improper control during code generation, allowing malicious input to be processed as executable code.

Impact Analysis

An attacker could exploit this to run malicious code on your system, potentially stealing data, installing malware, or disrupting services. It may lead to unauthorized access, data breaches, or system compromise if not patched.

Compliance Impact

This vulnerability could lead to data breaches, violating GDPR (data protection) and HIPAA (health data privacy). Non-compliance may result in legal penalties, fines, or reputational damage due to unauthorized access to sensitive data.

Mitigation Strategies

Update ASP.NET Core to the latest patched version immediately. Review network traffic for unusual code execution patterns. Disable unnecessary services in ASP.NET Core applications. Monitor logs for unauthorized access attempts.

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