Check Point Advisories

Microsoft SharePoint Server Insecure Deserialization (CVE-2025-54897)

Vulnerability
Protection

Check Point Reference:	CPAI-2025-14024
Date Published:	29 Mar 2026
Severity:	High
Last Updated:	Sunday 29 March, 2026
Source:
Industry Reference:	CVE-2025-54897
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Microsoft SharePoint Server prior to version 16.0.19127.20100 Microsoft SharePoint Server 2016 Microsoft SharePoint Server 2019
Vulnerability Description	An insecure deserialization vulnerability exists in Microsoft SharePoint Server. 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 SharePoint Server Insecure Deserialization (CVE-2025-54897) 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 SharePoint Server Insecure Deserialization (CVE-2025-54897)