CVE-2026-58633: CWE-416: Use After Free in Microsoft Windows 11 version 26H1
Use after free in Desktop Window Manager allows an authorized attacker to elevate privileges locally.
AI Analysis
Technical Summary
This vulnerability, identified as CVE-2026-58633, involves a use-after-free condition in the Desktop Window Manager of Windows 11 version 26H1 (build 10.0.28000.0). Exploitation requires local access with some privileges and does not require user interaction. Successful exploitation could lead to elevation of privileges, compromising confidentiality, integrity, and availability of the system. Microsoft has published an official fix to remediate this vulnerability.
Potential Impact
An authorized local attacker can exploit this use-after-free vulnerability to elevate their privileges on the affected Windows 11 system. This could result in full system compromise, including unauthorized access to sensitive information and the ability to execute arbitrary code with elevated rights.
Mitigation Recommendations
Microsoft has released an official fix for this vulnerability. It is recommended to apply the security update provided by Microsoft as soon as possible to mitigate the risk. No additional mitigation steps are indicated by the vendor advisory.
CVE-2026-58633: CWE-416: Use After Free in Microsoft Windows 11 version 26H1
Description
Use after free in Desktop Window Manager allows an authorized attacker to elevate privileges locally.
CVSS v3.1
Score 7.8high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability, identified as CVE-2026-58633, involves a use-after-free condition in the Desktop Window Manager of Windows 11 version 26H1 (build 10.0.28000.0). Exploitation requires local access with some privileges and does not require user interaction. Successful exploitation could lead to elevation of privileges, compromising confidentiality, integrity, and availability of the system. Microsoft has published an official fix to remediate this vulnerability.
Potential Impact
An authorized local attacker can exploit this use-after-free vulnerability to elevate their privileges on the affected Windows 11 system. This could result in full system compromise, including unauthorized access to sensitive information and the ability to execute arbitrary code with elevated rights.
Mitigation Recommendations
Microsoft has released an official fix for this vulnerability. It is recommended to apply the security update provided by Microsoft as soon as possible to mitigate the risk. No additional mitigation steps are indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-07-01T21:14:44.617Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58633","vendor":"Microsoft"}]
Threat ID: 6a5676c468715ace43f0b2f1
Added to database: 07/14/2026, 17:49:56 UTC
Last enriched: 08/13/2026, 16:11:38 UTC
Last updated: 08/28/2026, 06:12:57 UTC
Views: 130
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