CVE-2026-70194

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Improper Certificate Validation in .NET Framework

Publication date: 2026-10-13

Last updated on: 2026-10-14

Assigner: Microsoft Corporation

Description

Improper certificate validation in .NET Framework allows an unauthorized attacker to bypass a security feature over a network.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-10-13

Last Modified

2026-10-14

Generated

2026-10-19

AI Q&A

2026-10-14

EPSS Evaluated

2026-10-18

NVD

CVE-2026-70194

EUVD

EUVD-2026-99702

Affected Vendors & Products

Vendor	Product	Version / Range
Microsoft	.NET	11.0 11.0.0
Microsoft	Microsoft	Visual Studio 2022 version 17.14 17.14.0
Microsoft	Microsoft	Visual Studio 2026 version 18.10 18.10.0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-295	The product does not validate, or incorrectly validates, a certificate.

Attack-Flow Graph

Executive Summary

This vulnerability involves improper certificate validation in .NET Framework. An unauthorized attacker can bypass a security feature by exploiting this flaw over a network.

Impact Analysis

An attacker could exploit this to bypass security measures, potentially gaining unauthorized access to systems or data. This may lead to data breaches or unauthorized actions on affected systems.

Compliance Impact

This vulnerability could lead to unauthorized access, which may violate compliance requirements for data protection and security, such as GDPR or HIPAA. Organizations must address it to maintain regulatory compliance.

Mitigation Strategies

Apply the latest security updates from Microsoft for .NET Framework and Visual Studio to address improper certificate validation. Monitor Microsoft's update guide for patches and verify installation on affected systems.

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