CVE-2026-20840
Unknown
Unknown - Not Provided
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
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
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
AI Powered Q&A
Can you explain this vulnerability to me?
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]
How can this vulnerability impact me? :
An attacker with local authorization can exploit this vulnerability to execute arbitrary code, potentially leading to full system compromise including high impact on confidentiality, integrity, and availability. [1]
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