Check Point Advisories

Microsoft Windows Remote Desktop Services Remote Code Execution (CVE-2025-21309)

Vulnerability
Protection

Check Point Reference:	CPAI-2025-0003
Date Published:	14 Jan 2025
Severity:	High
Last Updated:	Tuesday 14 January, 2025
Source:	Microsoft CVE-2025-21309
Industry Reference:	CVE-2025-21309
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Windows Server 2019 Windows Server 2019 (Server Core installation) Windows Server 2022 Windows Server 2022 (Server Core installation) Windows Server 2025 (Server Core installation) Windows Server 2022, 23H2 Edition (Server Core installation) Windows Server 2025 Windows Server 2016 Windows Server 2016 (Server Core installation) Windows Server 2012 Windows Server 2012 (Server Core installation) Windows Server 2012 R2 Windows Server 2012 R2 (Server Core installation)
Vulnerability Description	A remote code execution vulnerability exists in Microsoft Windows Remote Desktop Services. Successful exploitation of this vulnerability could allow a remote attacker to execute arbitrary code on the affected system.

Protection Overview

This protection detects attempts to exploit this vulnerability.

In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.

Security Gateway R81 / R80 / R77 / R75

In the IPS tab, click Protections and find the Microsoft Windows Remote Desktop Services Remote Code Execution (CVE-2025-21309) protection using the Search tool and Edit the protection's settings.
Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name: Windows SMB Protection Violation.
Attack Information: Microsoft Windows Remote Desktop Services Remote Code Execution (CVE-2025-21309)