Check Point Advisories

Microsoft SharePoint Remote Code Execution (CVE-2026-50522)

Check Point Reference: CPAI-2026-9788
Date Published: 14 Jul 2026
Severity: Critical
Last Updated: Wednesday 29 July, 2026
Source: Microsoft CVE-2026-50522
Industry Reference:CVE-2026-50522
Protection Provided by:

Security Gateway
R81, R80, R77, R75
Who is Vulnerable? Microsoft SharePoint Enterprise Server 2016
Microsoft SharePoint Server 2019
Microsoft SharePoint Server Subscription Edition
Vulnerability Description Deserialization of untrusted data in Microsoft Office SharePoint allows an unauthorized attacker to execute code over a network.

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 SharePoint Remote Code Execution (CVE-2026-50522) 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 SharePoint Remote Code Execution (CVE-2026-50522)

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