Windows URL Moniker Path Equivalence Bypass

Publication date: 2026-09-08

Last updated on: 2026-09-24

Assigner: Microsoft Corporation

Description

Improper resolution of path equivalence in Windows URL Moniker allows an unauthorized attacker to bypass a security feature over a network.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-09-08

Last Modified

2026-09-24

Generated

2026-09-29

AI Q&A

2026-09-09

EPSS Evaluated

2026-09-27

NVD

CVE-2026-73019

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	url_moniker	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-41	The product is vulnerable to file system contents disclosure through path equivalence. Path equivalence involves the use of special characters in file and directory names. The associated manipulations are intended to generate multiple names for the same object.

Attack-Flow Graph

Executive Summary

This vulnerability involves improper handling of path equivalence in Windows URL Moniker. An attacker can exploit this to bypass a security feature over a network without needing authentication.

Impact Analysis

An unauthorized attacker could exploit this to access restricted resources or perform unintended actions by manipulating file paths. The impact is limited as it requires user interaction and has a low confidentiality impact.

Mitigation Strategies

Apply the latest security updates from Microsoft to address the improper path resolution in Windows URL Moniker. Monitor Microsoft's security advisories for patches and ensure all systems are updated promptly.

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