CVE-2026-54990

CRITICAL

Microsoft Windows 11 Version 24H2 - Remote Desktop Client Remote Code Execution Vulnerability

Title source: rule
STIX 2.1

Description

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

References (1)

Core 1
Core References
Vendor Advisory vendor-advisory patch
Remote Desktop Client Remote Code Execution Vulnerability
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54990

Scores

CVSS v3 9.8
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

Details

CWE
CWE-122
Status published
Products (5)
Microsoft/Windows 11 Version 24H2 10.0.26100.0 - 10.0.26100.8875
Microsoft/Windows 11 Version 25H2 10.0.26200.0 - 10.0.26200.8875
Microsoft/Windows 11 version 26H1 10.0.28000.0 - 10.0.28000.2269
Microsoft/Windows Server 2025 10.0.26100.0 - 10.0.26100.33158
Microsoft/Windows Server 2025 (Server Core installation) 10.0.26100.0 - 10.0.26100.33158
Published Jul 14, 2026
Tracked Since Jul 14, 2026