CVE-2026-70161
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Path Traversal in .NET Framework

Vulnerability report for CVE-2026-70161, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.

Publication date: 2026-10-13

Last updated on: 2026-10-13

Assigner: Microsoft Corporation

Description

Improper limitation of a pathname to a restricted directory ('path traversal') in .NET allows an authorized attacker to elevate privileges locally.

CVSS Scores

EPSS Scores

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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
EUVD

Affected Vendors & Products

Showing 5 associated CPEs
Vendor Product Version / Range
Microsoft .NET 10.0 10.0.0
Microsoft .NET 11.0 11.0.0
Microsoft .NET 9.0 9.0.0
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
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KEV
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CWE ID Description
CWE-22 The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

Attack-Flow Graph

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Executive Summary

This is a path traversal vulnerability in .NET where an authorized attacker can exploit improper pathname restrictions to elevate privileges locally. It allows bypassing directory access controls.

Impact Analysis

An attacker could gain higher privileges on your system, allowing them to access restricted files or execute unauthorized actions. This could lead to data theft, system compromise, or further attacks.

Mitigation Strategies

Apply the latest security updates from Microsoft for .NET 9.0, 10.0, 11.0, Visual Studio 2022 17.14, and Visual Studio 2026 18.10. Monitor Microsoft's security advisories for patches and follow their recommended mitigation steps.

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EPSS Chart