Use-after-free in Microsoft Windows and Windows Server - CVE-2026-58626
Published: July 17, 2026
Vulnerability identifier: #VU138162
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-58626
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to execute arbitrary code.
The vulnerability exists due to use-after-free in Windows Remote Desktop Services when handling Remote Desktop Protocol requests. A remote user can send specially crafted requests to execute arbitrary code.
Exploitation requires establishing a connection to the target system via Remote Desktop Protocol.
Affected software
Microsoft Windows
Windows Server
Windows Server
How to mitigate CVE-2026-58626
Install security update from vendor's website.
Microsoft Windows - addressed in versions 10 21H2 10.0.19044.7548, 10 22H2 10.0.19045.7548, 11 24H2 10.0.26100.8875, 11 26H1 10.0.28000.2525
Windows Server - addressed in versions 2012 R2 6.3.9600.23291, 2022 10.0.20348.5386, 2025 10.0.26100.33158
Windows Server - addressed in versions 2012 R2 6.3.9600.23291, 2022 10.0.20348.5386, 2025 10.0.26100.33158