CVE-2026-48566: CWE-125: Out-of-bounds Read in Microsoft Windows 11 Version 24H2
Out-of-bounds read in Windows DWM Core Library allows an authorized attacker to elevate privileges locally.
AI Analysis
Technical Summary
This vulnerability involves an out-of-bounds read in the Windows Desktop Window Manager (DWM) Core Library in Windows 11 Version 24H2 (build 10.0.26100.0). An attacker with local authorized access can exploit this flaw to read memory beyond intended boundaries, potentially disclosing sensitive information. The vulnerability does not allow code execution or denial of service. Microsoft has released an official fix to address this issue.
Potential Impact
The impact is limited to local information disclosure by an authorized user. There is no impact on system integrity or availability. Confidentiality is affected as sensitive information may be exposed due to the out-of-bounds read.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-48566 to remediate this vulnerability.
CVE-2026-48566: CWE-125: Out-of-bounds Read in Microsoft Windows 11 Version 24H2
Description
Out-of-bounds read in Windows DWM Core Library allows an authorized attacker to elevate privileges locally.
CVSS v3.1
Score 5.5medium
Affected software
Microsoft
Windows 11 Version 24H2
Microsoft
Windows 11 Version 25H2
Microsoft
Windows 11 version 26H1
Microsoft
Windows Server 2025
Microsoft
Windows Server 2025 (Server Core installation)
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an out-of-bounds read in the Windows Desktop Window Manager (DWM) Core Library in Windows 11 Version 24H2 (build 10.0.26100.0). An attacker with local authorized access can exploit this flaw to read memory beyond intended boundaries, potentially disclosing sensitive information. The vulnerability does not allow code execution or denial of service. Microsoft has released an official fix to address this issue.
Potential Impact
The impact is limited to local information disclosure by an authorized user. There is no impact on system integrity or availability. Confidentiality is affected as sensitive information may be exposed due to the out-of-bounds read.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-48566 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-05-21T20:00:35.245Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-48566","vendor":"Microsoft"}]
Threat ID: 6a284d0f8dd33fbd856658a4
Added to database: 06/09/2026, 17:27:43 UTC
Last enriched: 08/14/2026, 13:51:07 UTC
Last updated: 09/11/2026, 07:31:53 UTC
Views: 80
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