CVE-2026-69856
Undergoing Analysis Undergoing Analysis - In Progress

Use After Free in Windows Storage Allows Local Privilege Escalation

Publication date: 2026-10-13

Last updated on: 2026-10-16

Assigner: Microsoft Corporation

Description
Use after free in Windows Storage allows an authorized attacker to elevate privileges locally.

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Meta Information

Published
2026-10-13
Last Modified
2026-10-16
Generated
2026-10-19
AI Q&A
2026-10-14
EPSS Evaluated
2026-10-18
NVD
CVE-2026-69856
EUVD
EUVD-2026-99841

Affected Vendors & Products

Showing 14 associated CPEs
Vendor Product Version / Range
Microsoft Windows 10 Version 1809 10.0.17763.0
Microsoft Windows 10 Version 21H2 10.0.19044.0
Microsoft Windows 10 Version 22H2 10.0.19045.0
Microsoft Windows 11 version 23H2 10.0.22631.0
Microsoft Windows 11 Version 23H2 10.0.22631.0
Microsoft Windows 11 Version 24H2 10.0.26100.0
Microsoft Windows 11 Version 25H2 10.0.26200.0
Microsoft Windows 11 version 26H1 10.0.28000.0
Microsoft Windows 11 Version 26H2 10.0.26300.0
Microsoft Windows Server 2019 10.0.17763.0
Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.0
Microsoft Windows Server 2022 10.0.20348.0
Microsoft Windows Server 2025 10.0.26100.0
Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-416 The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
CWE-362 The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

Attack-Flow Graph

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Executive Summary

This is a use-after-free vulnerability in Windows Storage. It allows an authorized attacker with local access to elevate their privileges on the system.

Impact Analysis

An attacker could exploit this to gain higher privileges than intended, potentially allowing them to install programs, view or delete data, or create new accounts with full user rights.

Compliance Impact

The vulnerability allows local privilege escalation in Windows Storage, which could enable unauthorized access to sensitive data. This may impact compliance with GDPR (data protection) and HIPAA (health data security) by increasing risks of unauthorized data access or breaches.

Mitigation Strategies

Apply the latest security updates from Microsoft as soon as possible to patch the Windows Storage use-after-free vulnerability. Monitor Microsoft's update guide for patches and install them on all affected systems including Windows 10, 11, and Server versions listed in the CVE.

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