Check Point Advisories

Microsoft Windows Server Denial of Service (CVE-2025-30394)

Check Point Reference: CPAI-2025-0630
Date Published: 4 Aug 2025
Severity: High
Last Updated: Monday 04 August, 2025
Source:
Industry Reference:CVE-2025-30394
Protection Provided by:

Security Gateway
R81, R80, R77, R75
Who is Vulnerable? Microsoft Windows Server 2012
Microsoft Windows Server 2012 r2
Microsoft Windows Server 2016 prior to v10.0.14393.8066
Microsoft Windows Server 2019 prior to v10.0.17763.7314
Microsoft Windows Server 2022 prior to v10.0.20348.3692
Microsoft Windows Server 2022 23h2 prior to v10.0.25398.1611
Microsoft Windows Server 2025 prior to v10.0.26100.4061
Vulnerability Description A denial-of-service vulnerability exists in Microsoft Windows Server. Successful exploitation of this vulnerability would allow a remote attacker to create a denial of service condition 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

  1. In the IPS tab, click Protections and find the Microsoft Windows Server Denial of Service (CVE-2025-30394) protection using the Search tool and Edit the protection's settings.
  2. 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 Server Denial of Service (CVE-2025-30394)

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