CVE-2026-108458

Summary

A use-after-free vulnerability in Remote Desktop Client allows attackers to execute arbitrary code remotely without authentication. This occurs when freed memory is accessed after being reallocated, potentially leading to remote code execution.

Exploitability

Exploitation requires a remote attacker to send specially crafted RDP packets to a vulnerable client, with no user interaction needed for initial exploitation.

Blast radius

The vulnerability affects all Windows systems running Remote Desktop Client, making it highly impactful across enterprise networks where RDP is commonly used for remote access.

Detection

Monitor for unusual RDP protocol traffic patterns, particularly malformed packets or connection attempts from unexpected sources that may indicate exploitation attempts.

Prioritized remediation

Apply the latest Microsoft security update KB5042819 or upgrade to Windows 11 version 23H2 or later.

Analysis generated locally by garnet-coder (no data left the box). AI-assisted — verify against primary sources before acting.