Heap-Based Buffer Overflow in Windows NTFS Enables Local Code Execution

Publication date: 2026-01-13

Last updated on: 2026-01-13

Assigner: Microsoft Corporation

Description

Heap-based buffer overflow in Windows NTFS allows an authorized attacker to execute code locally.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-01-13

Last Modified

2026-01-13

Generated

2026-07-06

AI Q&A

2026-01-14

EPSS Evaluated

2026-07-05

NVD

CVE-2026-20922

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_ntfs	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-122	A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

Attack-Flow Graph

Executive Summary

This vulnerability is a heap-based buffer overflow in Windows NTFS that allows an authorized attacker to execute code locally on the affected system. [1]

Impact Analysis

An attacker who is authorized on the system can exploit this vulnerability to execute arbitrary code locally, potentially leading to full system compromise including confidentiality, integrity, and availability impacts. [1]

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