CVE-2026-20872
Unknown Unknown - Not Provided
Path Traversal in Windows NTLM Enables Network Spoofing

Publication date: 2026-01-13

Last updated on: 2026-03-27

Assigner: Microsoft Corporation

Description
External control of file name or path in Windows NTLM allows an unauthorized attacker to perform spoofing over a network.
CVSS Scores
EPSS Scores
Probability:
Percentile:
Meta Information
Published
2026-01-13
Last Modified
2026-03-27
Generated
2026-06-16
AI Q&A
2026-01-14
EPSS Evaluated
2026-06-14
NVD
CVE-2026-20872
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
microsoft windows_ntlm *
Helpful Resources
Exploitability
CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-73 The product allows user input to control or influence paths or file names that are used in filesystem operations.
Attack-Flow Graph
AI Quick Actions
Instant insights powered by AI
Executive Summary

This vulnerability involves external control of the file name or path in Windows NTLM, which allows an unauthorized attacker to perform spoofing over a network. [1]

Impact Analysis

The vulnerability can impact you by enabling an unauthorized attacker to spoof identities or resources over a network, potentially leading to security breaches. [1]

Chat Assistant
Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-20872. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70
EPSS Chart