CVE-2025-49666

Published: Jul 8, 2025Modified: Jul 15, 2025

7.2

Vector

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

Exploitability: 1.2 / Impact: 5.9

Source: secure@microsoft.com (Secondary)

Description

Heap-based buffer overflow in Windows Kernel allows an authorized attacker to execute code over a network.

Affected (5)

Products: Microsoft: Windows Server 2016, Windows Server 2019, Windows Server 2022, Windows Server 2022 23h2, Windows Server 2025

5 products

Windows Server 2016

Windows Server 2019

Windows Server 2022

Windows Server 2022 23h2

Windows Server 2025

Configuration A

5 vulnerable

Vulnerable Software	Affected Versions
Microsoft Windows Server 2016	Before 10.0.14393.8246
Microsoft Windows Server 2019	Before 10.0.17763.7558
Microsoft Windows Server 2022	Before 10.0.20348.3932
Microsoft Windows Server 2022 23h2	Before 10.0.25398.1732
Microsoft Windows Server 2025	Before 10.0.26100.4652

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-2025-49666

Source: secure@microsoft.com

Vendor Advisory

Timeline

No history available yet.