Use After Free in Windows DWM Core Library Permits Privilege Escalation

Publication date: 2026-09-08

Last updated on: 2026-09-22

Assigner: Microsoft Corporation

Description

Use after free in Windows DWM Core Library allows an authorized attacker to elevate privileges over a network.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-09-08

Last Modified

2026-09-22

Generated

2026-09-29

AI Q&A

2026-09-10

EPSS Evaluated

2026-09-27

NVD

CVE-2026-69775

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_11_23h2	to 10.0.22631.7582 (exc)
microsoft	windows_11_23h2	to 10.0.22631.7582 (exc)
microsoft	windows_server_2025	to 10.0.26100.33438 (exc)

Helpful Resources

Exploitability

CWE

KEV

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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Attack-Flow Graph

Executive Summary

This is a use-after-free vulnerability in the Windows Desktop Window Manager (DWM) Core Library. It allows an authorized attacker to elevate their privileges by exploiting memory corruption after freeing an object. The attack can be performed remotely over a network.

Impact Analysis

An attacker could exploit this to gain higher privileges 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 combined with other vulnerabilities.

Mitigation Strategies

Apply the latest security updates from Microsoft to patch the Windows DWM Core Library vulnerability. Monitor Microsoft's security advisories for patches and install them promptly.

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