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CVE-2026-41096: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 11 version 23H2

0
Critical
VulnerabilityCVE-2026-41096cvecve-2026-41096cwe-122
Published: 05/12/2026 (05/12/2026, 16:58:52 UTC)
Source: CVE Database V5
Vendor/Project: Microsoft
Product: 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

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Affected software

Microsoft

Windows 11 version 23H2

Affected versions
>=10.0.22631.0 <10.0.22631.7079

Microsoft

Windows 11 Version 23H2

Affected versions
>=10.0.22631.0 <10.0.22631.7219

Microsoft

Windows 11 Version 24H2

Affected versions
>=10.0.26100.0 <10.0.26100.8457

Microsoft

Windows 11 Version 25H2

Affected versions
>=10.0.26200.0 <10.0.26200.8457

Microsoft

Windows 11 version 26H1

Affected versions
>=10.0.28000.0 <10.0.28000.2113

Microsoft

Windows Server 2022, 23H2 Edition (Server Core installation)

Affected versions
>=10.0.25398.0 <10.0.25398.2330

Microsoft

Windows Server 2025

Affected versions
>=10.0.26100.0 <10.0.26100.32860

Microsoft

Windows Server 2025 (Server Core installation)

Affected versions
>=10.0.26100.0 <10.0.26100.32860

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 08/11/2026, 16:51:40 UTC

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.

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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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