CVE-2026-54126

Published: Jul 14, 2026Modified: Jul 22, 2026

6.5

Vector

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

Exploitability: 2.8 / Impact: 3.6

Source: secure@microsoft.com (Secondary)

Description

Out-of-bounds read in Windows RDP allows an unauthorized attacker to disclose information over a network.

Affected (15)

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

12 products

Windows 10 1607

Windows 10 1809

Windows 10 21h2

Windows 10 22h2

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

15 vulnerable

Vulnerable Software	Affected Versions
Microsoft Windows 10 1607	Before 10.0.14393.9339
Microsoft Windows 10 1607	Before 10.0.14393.9339
Microsoft Windows 10 1809	Before 10.0.17763.9020
Microsoft Windows 10 1809	Before 10.0.17763.9020
Microsoft Windows 10 21h2	Before 10.0.19044.7548
Microsoft Windows 10 22h2	Before 10.0.19045.7548
Microsoft Windows 11 24h2	Before 10.0.26100.8875
Microsoft Windows 11 25h2	Before 10.0.26200.8875
Microsoft Windows 11 26h1	Before 10.0.28000.2525
Microsoft Windows 11 26h1	Before 10.0.28000.2269
Microsoft Windows Server 2012	All versions
Microsoft Windows Server 2016	Before 10.0.14393.9339
Microsoft Windows Server 2019	Before 10.0.17763.9020
Microsoft Windows Server 2022	Before 10.0.20348.5386
Microsoft Windows Server 2025	Before 10.0.26100.33158

Related CWEs

Out-of-bounds Read

The product reads data past the end, or before the beginning, of the intended buffer.

References (1)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54126

Source: secure@microsoft.com

PatchVendor Advisory

Timeline

No history available yet.