CVE-2026-62703

Analyzed Analyzed - Analysis Complete

Out-of-bounds Read in Windows DWM Core Library

Publication date: 2026-08-11

Last updated on: 2026-08-16

Assigner: Microsoft Corporation

Description

Out-of-bounds read in Windows DWM Core Library allows an authorized attacker to disclose information locally.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-08-11

Last Modified

2026-08-16

Generated

2026-09-01

AI Q&A

2026-08-11

EPSS Evaluated

2026-08-30

NVD

CVE-2026-62703

EUVD

EUVD-2026-56349

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_10_1809	to 10.0.17763.9115 (exc)
microsoft	windows_10_1809	to 10.0.17763.9115 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7663 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7663 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7663 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7663 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7663 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7663 (exc)
microsoft	windows_11_23h2	to 10.0.22631.7517 (exc)
microsoft	windows_11_23h2	to 10.0.22631.7517 (exc)
microsoft	windows_11_24h2	to 10.0.26100.9106 (exc)
microsoft	windows_11_24h2	to 10.0.26100.9106 (exc)
microsoft	windows_11_26h1	to 10.0.28000.2704 (exc)
microsoft	windows_11_26h1	to 10.0.28000.2704 (exc)
microsoft	windows_11_25h2	to 10.0.26200.9106 (exc)
microsoft	windows_11_25h2	to 10.0.26200.9106 (exc)
microsoft	windows_server_2019	to 10.0.17763.9115 (exc)
microsoft	windows_server_2022	to 10.0.20348.5440 (exc)
microsoft	windows_server_2025	to 10.0.26100.33222 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-125	The product reads data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

Executive Summary

This is an out-of-bounds read vulnerability in the Windows Desktop Window Manager (DWM) Core Library. It allows an authorized attacker with local access to read beyond allocated memory boundaries, potentially exposing sensitive information.

Detection Guidance

This vulnerability is an out-of-bounds read in the Windows Desktop Window Manager (DWM) Core Library. Detection typically requires analyzing system logs or memory dumps for abnormal DWM behavior. Use Windows Event Viewer to check for DWM-related errors or crashes. Microsoft's official security updates should be applied to mitigate this issue.

Impact Analysis

An attacker could exploit this to access confidential data stored in memory, such as passwords or encryption keys, if they already have local access to the system. This does not allow remote exploitation.

Compliance Impact

This vulnerability allows local information disclosure due to an out-of-bounds read in the Windows DWM Core Library. Such information disclosure could potentially expose sensitive data, which may impact compliance with regulations like GDPR (if personal data is involved) or HIPAA (if protected health information is disclosed).

Mitigation Strategies

Apply the latest security updates from Microsoft to patch the out-of-bounds read vulnerability in the Windows DWM Core Library.

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