CVE-2026-41096: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 11 version 23H2
Heap-based buffer overflow in Microsoft Windows DNS allows an unauthorized attacker to execute code over a network.
AI Analysis
Technical Summary
This vulnerability (CWE-122) involves a heap-based buffer overflow in the DNS functionality of Microsoft Windows 11 version 23H2. An attacker can exploit this flaw remotely to execute arbitrary code, potentially leading to full system compromise. The CVSS v3.1 base score is 9.8, reflecting its critical severity with network attack vector, no privileges required, and no user interaction needed. Microsoft has released an official fix for this vulnerability as documented in their security update guide.
Potential Impact
Successful exploitation allows remote code execution with high impact on confidentiality, integrity, and availability. An attacker can run arbitrary code in the context of the affected system, potentially gaining full control. This can lead to system compromise, data theft, or disruption of services.
Mitigation Recommendations
An official patch is available from Microsoft and should be applied immediately to affected systems. The vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-41096 provides detailed update instructions. No additional mitigations are specified beyond applying the official fix.
CVE-2026-41096: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 11 version 23H2
Description
Heap-based buffer overflow in Microsoft Windows DNS allows an unauthorized attacker to execute code over a network.
CVSS v3.1
Score 9.8critical
Affected software
Microsoft
Windows 11 version 23H2
Microsoft
Windows 11 Version 23H2
Microsoft
Windows 11 Version 24H2
Microsoft
Windows 11 Version 25H2
Microsoft
Windows 11 version 26H1
Microsoft
Windows Server 2022, 23H2 Edition (Server Core installation)
Microsoft
Windows Server 2025
Microsoft
Windows Server 2025 (Server Core installation)
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-122) involves a heap-based buffer overflow in the DNS functionality of Microsoft Windows 11 version 23H2. An attacker can exploit this flaw remotely to execute arbitrary code, potentially leading to full system compromise. The CVSS v3.1 base score is 9.8, reflecting its critical severity with network attack vector, no privileges required, and no user interaction needed. Microsoft has released an official fix for this vulnerability as documented in their security update guide.
Potential Impact
Successful exploitation allows remote code execution with high impact on confidentiality, integrity, and availability. An attacker can run arbitrary code in the context of the affected system, potentially gaining full control. This can lead to system compromise, data theft, or disruption of services.
Mitigation Recommendations
An official patch is available from Microsoft and should be applied immediately to affected systems. The vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-41096 provides detailed update instructions. No additional mitigations are specified beyond applying the official fix.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-04-16T19:12:36.195Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-41096","vendor":"Microsoft"}]
Threat ID: 6a03655ecbff5d861008cb8a
Added to database: 05/12/2026, 17:37:34 UTC
Last enriched: 08/11/2026, 16:51:40 UTC
Last updated: 09/14/2026, 22:01:34 UTC
Views: 109
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