CVE-2026-85853
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Out-of-Bounds Read in Windows DWM Core Library

Publication date: 2026-10-13

Last updated on: 2026-10-13

Assigner: Microsoft Corporation

Description
Out-of-bounds read in Windows DWM Core Library allows an authorized attacker to elevate privileges locally.

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Meta Information

Published
2026-10-13
Last Modified
2026-10-13
Generated
2026-10-14
AI Q&A
2026-10-13
EPSS Evaluated
N/A
NVD
CVE-2026-85853
EUVD
EUVD-2026-99557

Affected Vendors & Products

Showing 16 associated CPEs
Vendor Product Version / Range
Microsoft Windows 10 Version 1607 10.0.14393.0
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 26H2 10.0.26300.0
Microsoft Windows Server 2016 10.0.14393.0
Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.0
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-125 The product reads data past the end, or before the beginning, of the intended buffer.

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Executive Summary

This vulnerability is an out-of-bounds read flaw in the Windows Desktop Window Manager (DWM) Core Library. It allows an authorized local attacker to elevate their privileges on the system by exploiting improper memory access in the DWM component.

Impact Analysis

An attacker could exploit this to gain higher-level permissions on your system, potentially allowing them to install programs, view or delete data, or create new accounts with full user rights. This could lead to complete system compromise if not patched.

Mitigation Strategies

Apply the latest Windows security updates from Microsoft to patch the DWM Core Library vulnerability. Monitor Microsoft's security advisories for updates and disable unnecessary user privileges until patched.

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