A critical use after free vulnerability in the Microsoft Desktop Window Manager allows a local attacker to achieve privilege escalation on various Windows 10, 11, and Server operating systems.

This is a use after free flaw occurring within the Desktop Window Manager component. The vulnerability requires the attacker to have local authenticated access to the target system to trigger the memory corruption and execute the privilege escalation.

Successful exploitation allows a low privileged attacker to gain elevated privileges on the host system, potentially leading to full system compromise. Given the CVSS score of 7.8, this vulnerability poses a significant risk to organizational security, as it facilitates unauthorized access to sensitive data and critical system functions.

Immediate Action: Apply the relevant security updates provided by Microsoft in the official update guide to all affected Windows endpoints and servers.

Proactive Monitoring: Monitor system logs for unusual process creation or unauthorized attempts to access sensitive system files that might indicate post-exploitation activity.

Compensating Controls: Ensure that the principle of least privilege is strictly enforced to limit the number of users with local interactive access, thereby reducing the attack surface.

Public Exploit Available: No

Organizations should prioritize the deployment of the identified security patches across all affected Windows environments. Given that this vulnerability allows for local privilege escalation, it is essential to patch systems where users have interactive login capabilities to prevent a potential compromise of administrative accounts.