CVE-2026-47289

Published: Jun 9, 2026Modified: Jun 12, 2026

8.8

Vector

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

Exploitability: 2.8 / Impact: 5.9

Source: secure@microsoft.com

Description

Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code over a network.

Affected (25)

Products: Microsoft: Windows 10 1607, Windows 10 1809, Windows 10 21h2, Windows 10 22h2, Windows 11 23h2, Windows 11 24h2, Windows 11 25h2, Windows 11 26h1, Windows App, Windows Server 2012, Windows Server 2016, Windows Server 2019, Windows Server 2022, Windows Server 2025

14 products

Windows 10 1607

Windows 10 1809

Windows 10 21h2

Windows 10 22h2

Windows 11 23h2

Windows 11 24h2

Windows 11 25h2

Windows 11 26h1

Windows Server 2012

Windows Server 2016

Windows Server 2019

Windows Server 2022

Windows Server 2025

Configuration A

25 vulnerable

Vulnerable Software	Affected Versions
Microsoft Windows 10 1607	Before 10.0.14393.9234
Microsoft Windows 10 1607	Before 10.0.14393.9234
Microsoft Windows 10 1809	Before 10.0.17763.8880
Microsoft Windows 10 1809	Before 10.0.17763.8880
Microsoft Windows 10 21h2	Before 10.0.19044.7417
Microsoft Windows 10 21h2	Before 10.0.19044.7417
Microsoft Windows 10 21h2	Before 10.0.19044.7417
Microsoft Windows 10 22h2	Before 10.0.19045.7417
Microsoft Windows 10 22h2	Before 10.0.19045.7417
Microsoft Windows 10 22h2	Before 10.0.19045.7417
Microsoft Windows 11 23h2	Before 10.0.22631.7219
Microsoft Windows 11 23h2	Before 10.0.22631.7219
Microsoft Windows 11 24h2	Before 10.0.26100.8655
Microsoft Windows 11 24h2	Before 10.0.26100.8655
Microsoft Windows 11 25h2	Before 10.0.26200.8655
Microsoft Windows 11 25h2	Before 10.0.26200.8655
Microsoft Windows 11 26h1	Before 10.0.28000.2269
Microsoft Windows 11 26h1	Before 10.0.28000.2269
Microsoft Windows App	Before 2.0.1193.0
Microsoft Windows Server 2012	All versions
Microsoft Windows Server 2012	Version r2
Microsoft Windows Server 2016	Before 10.0.14393.9234
Microsoft Windows Server 2019	Before 10.0.17763.8880
Microsoft Windows Server 2022	Before 10.0.20348.5256
Microsoft Windows Server 2025	Before 10.0.26100.32995

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-2026-47289

Source: secure@microsoft.com

Vendor Advisory

Timeline

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