CVE-2026-88136

Analyzed Analyzed - Analysis Complete

Path Equivalence Flaw in WebDAV Leads to Remote Code Execution

Publication date: 2026-10-13

Last updated on: 2026-11-06

Assigner: Microsoft Corporation

Description

Improper resolution of path equivalence in WebDAV allows an authorized attacker to execute code over a network.

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Meta Information

Published

2026-10-13

Last Modified

2026-11-06

Generated

2026-11-08

AI Q&A

2026-10-13

EPSS Evaluated

2026-11-07

NVD

CVE-2026-88136

EUVD

EUVD-2026-99657

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_server_2012	r2
microsoft	windows_server_2012	*
microsoft	windows_10_1607	to 10.0.14393.9612 (exc)
microsoft	windows_10_1607	to 10.0.14393.9612 (exc)
microsoft	windows_10_1809	to 10.0.17763.9376 (exc)
microsoft	windows_10_1809	to 10.0.17763.9376 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7807 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7807 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7807 (exc)
microsoft	windows_11_23h2	to 10.0.22631.7652 (exc)
microsoft	windows_11_23h2	to 10.0.22631.7652 (exc)
microsoft	windows_11_24h2	to 10.0.26100.9711 (exc)
microsoft	windows_11_24h2	to 10.0.26100.9711 (exc)
microsoft	windows_11_25h2	to 10.0.26200.9711 (exc)
microsoft	windows_11_25h2	to 10.0.26200.9711 (exc)
microsoft	windows_11_26h1	to 10.0.28000.3231 (exc)
microsoft	windows_11_26h1	to 10.0.28000.3231 (exc)
microsoft	windows_11_26h2	to 10.0.26300.9711 (exc)
microsoft	windows_11_26h2	to 10.0.26300.9711 (exc)
microsoft	windows_server_2025	to 10.0.26100.33650 (exc)
microsoft	windows_server_2022	to 10.0.20348.5761 (exc)
microsoft	windows_server_2016	to 10.0.14393.9612 (exc)
microsoft	windows_server_2019	to 10.0.17763.9376 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7807 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7807 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7807 (exc)

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 WebDAV, allowing an authorized attacker to execute arbitrary code remotely over a network. It affects multiple versions of Windows and Windows Server.

Impact Analysis

An attacker could exploit this to run malicious code on your system, potentially leading to data theft, system compromise, or further network infiltration. It requires authorized access but can cause significant damage once exploited.

Compliance Impact

This vulnerability could lead to unauthorized code execution, potentially violating data protection requirements under GDPR or HIPAA by exposing sensitive data or systems to compromise.

Mitigation Strategies

Apply the latest security updates from Microsoft to patch the WebDAV path equivalence vulnerability. Disable WebDAV services if not required and restrict network access to WebDAV ports.

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