CVE-2026-20940
Unknown Unknown - Not Provided
Heap-Based Buffer Overflow in Windows Cloud Files Driver Elevates Privileges

Publication date: 2026-01-13

Last updated on: 2026-01-13

Assigner: Microsoft Corporation

Description
Heap-based buffer overflow in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally.
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Meta Information
Published
2026-01-13
Last Modified
2026-01-13
Generated
2026-06-16
AI Q&A
2026-01-14
EPSS Evaluated
2026-06-15
NVD
CVE-2026-20940
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
microsoft windows_cloud_files_mini_filter_driver *
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-822 The product obtains a value from an untrusted source, converts this value to a pointer, and dereferences the resulting pointer.
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Executive Summary

This vulnerability is a heap-based buffer overflow in the Windows Cloud Files Mini Filter Driver that allows an authorized attacker to elevate their privileges locally on the affected system. [1]

Impact Analysis

An attacker who is already authorized on the system can exploit this vulnerability to gain higher privileges, potentially allowing them to execute actions with elevated rights that they should not normally have. [1]

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