CVE-2026-41096

Published: May 12, 2026Modified: Jun 17, 2026

9.8

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitability: 3.9 / Impact: 5.9

Source: secure@microsoft.com (Secondary)

Description

Heap-based buffer overflow in Microsoft Windows DNS allows an unauthorized attacker to execute code over a network.

Affected (10)

Products: Microsoft: Windows 11 23h2, Windows 11 24h2, Windows 11 25h2, Windows 11 26h1, Windows Server 2022 23h2, Windows Server 2025

6 products

Windows 11 23h2

Windows 11 24h2

Windows 11 25h2

Windows 11 26h1

Windows Server 2022 23h2

Windows Server 2025

Configuration A

10 vulnerable

Vulnerable Software	Affected Versions
Microsoft Windows 11 23h2	Before 10.0.22631.7079
Microsoft Windows 11 23h2	Before 10.0.22631.7079
Microsoft Windows 11 24h2	Before 10.0.26100.8390
Microsoft Windows 11 24h2	Before 10.0.26100.8390
Microsoft Windows 11 25h2	Before 10.0.26200.8390
Microsoft Windows 11 25h2	Before 10.0.26200.8390
Microsoft Windows 11 26h1	Before 10.0.28000.2113
Microsoft Windows 11 26h1	Before 10.0.28000.2113
Microsoft Windows Server 2022 23h2	Before 10.0.25398.2330
Microsoft Windows Server 2025	Before 10.0.26100.32772

Related CWEs

Heap-based Buffer Overflow

A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

References (1)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-41096

Source: secure@microsoft.com

Vendor Advisory

Timeline

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