CVE-2026-44808: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 11 version 26H1
Use after free in Windows DWM Core Library allows an authorized attacker to elevate privileges locally.
AI Analysis
Technical Summary
This vulnerability involves a use-after-free condition in the Windows Desktop Window Manager (DWM) Core Library, leading to a heap-based buffer overflow. An authorized attacker with local access can exploit this flaw to elevate their privileges on the affected system. The CVSS v3.1 base score is 7.8, indicating a high severity level. Microsoft has released an official fix for this vulnerability as documented in their security update guide.
Potential Impact
Successful exploitation of this vulnerability allows an attacker with local access and limited privileges to gain higher privileges on the affected Windows 11 system. This can lead to full system compromise, including the ability to execute arbitrary code with elevated rights, potentially impacting confidentiality, integrity, and availability of the system.
Mitigation Recommendations
An official fix is available from Microsoft. It is recommended to apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-44808 to remediate this vulnerability.
CVE-2026-44808: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 11 version 26H1
Description
Use after free in Windows DWM Core Library allows an authorized attacker to elevate privileges locally.
CVSS v3.1
Score 7.8high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a use-after-free condition in the Windows Desktop Window Manager (DWM) Core Library, leading to a heap-based buffer overflow. An authorized attacker with local access can exploit this flaw to elevate their privileges on the affected system. The CVSS v3.1 base score is 7.8, indicating a high severity level. Microsoft has released an official fix for this vulnerability as documented in their security update guide.
Potential Impact
Successful exploitation of this vulnerability allows an attacker with local access and limited privileges to gain higher privileges on the affected Windows 11 system. This can lead to full system compromise, including the ability to execute arbitrary code with elevated rights, potentially impacting confidentiality, integrity, and availability of the system.
Mitigation Recommendations
An official fix is available from Microsoft. It is recommended to apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-44808 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-05-07T20:07:18.271Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-44808","vendor":"Microsoft"}]
Threat ID: 6a284cce8dd33fbd85664a0c
Added to database: 6/9/2026, 5:26:38 PM
Last enriched: 6/9/2026, 10:42:09 PM
Last updated: 6/10/2026, 6:26:04 AM
Views: 5
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