CVE-2026-108398

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Untrusted Search Path in .NET Framework

Publication date: 2026-10-13

Last updated on: 2026-10-13

Assigner: Microsoft Corporation

Description

Untrusted search path in .NET Framework allows an authorized attacker to bypass a security feature locally.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-10-13

Last Modified

2026-10-13

Generated

2026-10-19

AI Q&A

2026-10-14

EPSS Evaluated

2026-10-18

NVD

CVE-2026-108398

EUVD

EUVD-2026-99069

Affected Vendors & Products

Vendor	Product	Version / Range
Microsoft	Microsoft	.NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 3.0.0.0
Microsoft	Microsoft	.NET Framework 3.5 AND 4.7.2 4.7.0
Microsoft	Microsoft	.NET Framework 3.5 AND 4.8 4.8.0
Microsoft	Microsoft	.NET Framework 3.5 AND 4.8.1 4.8.1
Microsoft	Microsoft	.NET Framework 4.6.2/4.7/4.7.1/4.7.2 4.7.0
Microsoft	Microsoft	.NET Framework 4.8 4.8.0
Microsoft	Microsoft	.NET Framework 4.8.1 4.8.0.0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-426	The product searches for critical resources using an externally-supplied search path that can point to resources that are not under the product's direct control.

Attack-Flow Graph

Executive Summary

This vulnerability involves an untrusted search path in the .NET Framework. An authorized attacker can exploit this locally to bypass a security feature, potentially allowing unauthorized actions.

Impact Analysis

An attacker could exploit this to bypass security controls, gain elevated privileges, or execute malicious code on your system. This may lead to data breaches, system compromise, or further network infiltration.

Compliance Impact

This vulnerability allows an authorized attacker to bypass a security feature locally, which could undermine data protection controls required by standards like GDPR and HIPAA. Failure to address this may result in non-compliance with data integrity and confidentiality requirements.

Mitigation Strategies

Apply the latest security updates from Microsoft for affected .NET Framework versions to address the untrusted search path issue.

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