CVE-2026-44808: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 11 version 26H1
Heap-based buffer overflow in Windows DWM Core Library allows an authorized attacker to elevate privileges locally.
AI Analysis
Technical Summary
This vulnerability involves a heap-based buffer overflow in the Windows Desktop Window Manager (DWM) Core Library in Windows 11 version 26H1 (build 10.0.28000.0). An attacker with local authorization can exploit this flaw to gain elevated privileges, potentially allowing them to execute code with higher permissions. The vulnerability is tracked as CVE-2026-44808 and is classified under CWE-122 (Heap-based Buffer Overflow). Microsoft has published an official security update to remediate this issue.
Potential Impact
Successful exploitation of this vulnerability could allow an authorized local attacker to elevate their privileges on the affected Windows 11 system. This could lead to full system compromise, including the ability to execute arbitrary code with elevated rights, resulting in confidentiality, integrity, and availability impacts rated as high.
Mitigation Recommendations
Microsoft has released an official security update that fixes this vulnerability. It is strongly recommended to apply the provided patch from the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-44808 to remediate this issue. No additional mitigation steps are indicated by the vendor.
CVE-2026-44808: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 11 version 26H1
Description
Heap-based buffer overflow in Windows DWM Core Library allows an authorized attacker to elevate privileges locally.
CVSS v3.1
Score 7.8high
Affected software
Microsoft
Windows 11 version 26H1
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a heap-based buffer overflow in the Windows Desktop Window Manager (DWM) Core Library in Windows 11 version 26H1 (build 10.0.28000.0). An attacker with local authorization can exploit this flaw to gain elevated privileges, potentially allowing them to execute code with higher permissions. The vulnerability is tracked as CVE-2026-44808 and is classified under CWE-122 (Heap-based Buffer Overflow). Microsoft has published an official security update to remediate this issue.
Potential Impact
Successful exploitation of this vulnerability could allow an authorized local attacker to elevate their privileges on the affected Windows 11 system. This could lead to full system compromise, including the ability to execute arbitrary code with elevated rights, resulting in confidentiality, integrity, and availability impacts rated as high.
Mitigation Recommendations
Microsoft has released an official security update that fixes this vulnerability. It is strongly recommended to apply the provided patch from the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-44808 to remediate this issue. No additional mitigation steps are indicated by the vendor.
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: 06/09/2026, 17:26:38 UTC
Last enriched: 08/14/2026, 13:26:10 UTC
Last updated: 09/14/2026, 22:01:34 UTC
Views: 77
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