CVE-2026-50474
Microsoft · Windows
A use after free vulnerability in the Microsoft Windows Remote Desktop Client allows an unauthenticated attacker to execute arbitrary code over a network via user interaction.
Executive summary
A critical use after free vulnerability in the Windows Remote Desktop Client could allow a remote attacker to execute arbitrary code, posing a significant risk to system integrity.
Vulnerability
This is a use after free vulnerability (CWE-416) within the Remote Desktop Client. The attack vector is network based and requires no authentication, though it does rely on user interaction to facilitate the exploit.
Business impact
Successful exploitation of this flaw allows a remote attacker to execute code with the permissions of the current user. Given the CVSS score of 8.8, this vulnerability presents a high risk of total system compromise, unauthorized data access, and potential lateral movement within the network.
Remediation
Immediate Action: Apply the latest security updates provided in the Microsoft Security Update Guide to all affected Windows systems.
Proactive Monitoring: Monitor network traffic for unusual Remote Desktop Protocol (RDP) patterns or unexpected process execution originating from the RDP client.
Compensating Controls: Restrict RDP access to trusted networks and ensure that users are educated on the risks of initiating remote sessions with untrusted or unknown hosts.
Exploitation status
Public Exploit Available: No (exploit_available: false)
Analyst recommendation
Due to the high CVSS severity and the nature of use after free vulnerabilities, organizations should prioritize patching these affected Windows versions. Deployment of the official security update is the only definitive way to remediate this risk.