BaseFortify

Publication date: 2025-10-14

Last updated on: 2025-10-23

Assigner: Microsoft Corporation

Description

Improper link resolution before file access ('link following') in .NET allows an authorized attacker to elevate privileges locally.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2025-10-14

Last Modified

2025-10-23

Generated

2026-07-06

AI Q&A

2025-10-14

EPSS Evaluated

2026-07-05

NVD

CVE-2025-55247

Affected Vendors & Products

Vendor	Product	Version / Range
linux	linux_kernel	From 5.15.160 (inc) to 5.16 (inc)
microsoft	.net	From 8.0.0 (inc) to 8.0.21 (exc)
microsoft	.net	From 9.0.0 (inc) to 9.0.10 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-59	The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.

Attack-Flow Graph

Executive Summary

This vulnerability involves improper link resolution before file access in the .NET framework, which allows an authorized attacker to elevate their privileges locally by exploiting how symbolic links are handled.

Impact Analysis

An attacker with some level of authorization on the affected system could exploit this vulnerability to gain higher privileges than intended, potentially leading to full control over the system, data compromise, or disruption of services.

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