Check Point Advisories

Microsoft Windows NTLM Information Disclosure (CVE-2025-21377)

Vulnerability
Protection

Check Point Reference:	CPAI-2025-0032
Date Published:	11 Feb 2025
Severity:	Medium
Last Updated:	Tuesday 11 February, 2025
Source:	Microsoft CVE-2025-21377
Industry Reference:	CVE-2025-21377
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Windows 10 for 32-bit Systems Windows 10 for x64-based Systems Windows 10 Version 1607 for 32-bit Systems Windows 10 Version 1607 for x64-based Systems Windows 10 Version 1809 for 32-bit Systems Windows 10 Version 1809 for x64-based Systems Windows 10 Version 21H2 for 32-bit Systems Windows 10 Version 21H2 for ARM64-based Systems Windows 10 Version 21H2 for x64-based Systems Windows 10 Version 22H2 for 32-bit Systems Windows 10 Version 22H2 for ARM64-based Systems Windows 10 Version 22H2 for x64-based Systems Windows 11 Version 22H2 for ARM64-based Systems Windows 11 Version 22H2 for x64-based Systems Windows 11 Version 23H2 for ARM64-based Systems Windows 11 Version 23H2 for x64-based Systems Windows 11 Version 24H2 for ARM64-based Systems Windows 11 Version 24H2 for x64-based Systems Windows Server 2008 for 32-bit Systems Service Pack 2 Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) Windows Server 2008 for x64-based Systems Service Pack 2 Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) Windows Server 2008 R2 for x64-based Systems Service Pack 1 Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) Windows Server 2012 Windows Server 2012 (Server Core installation) Windows Server 2012 R2 Windows Server 2012 R2 (Server Core installation) Windows Server 2016 Windows Server 2016 (Server Core installation) Windows Server 2019 Windows Server 2019 (Server Core installation) Windows Server 2022 Windows Server 2022 (Server Core installation) Windows Server 2022, 23H2 Edition (Server Core installation) Windows Server 2025 Windows Server 2025 (Server Core installation)
Vulnerability Description	An information disclosure vulnerability exists in the NTLM component of Microsoft Windows. Successful exploitation of this vulnerability would allow remote attackers to gain access to sensitive information and gain unauthorized access into 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 NTLM Information Disclosure (CVE-2025-21377) 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 NTLM Information Disclosure (CVE-2025-21377)