cve-2026-42909

CVE-2026-42909 is a Microsoft-disclosed Remote Desktop Client remote code execution vulnerability rated Important. It affects supported Windows client and server releases, the standalone Remote Desktop client for Windows Desktop, and the Windows App client. The vulnerability allows a malicious or compromised Remote Desktop server to execute code on the client machine when a victim connects. This tag covers discussions about patching, mitigation strategies, and the broader security implications for administrators who rely on outbound RDP connections. Topics include the attack surface of the RDP client, Microsoft's advisory, and best practices for locking down outbound admin connections to reduce risk.