Check Point Advisories

Microsoft Windows IKE Extension Use After Free (CVE-2026-33824)

Vulnerability
Protection

Check Point Reference:	CPAI-2026-3591
Date Published:	3 May 2026
Severity:	High
Last Updated:	Sunday 03 May, 2026
Source:
Industry Reference:	CVE-2026-33824
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Microsoft Windows IKE Extension
Vulnerability Description	A use after free vulnerability in Microsoft Windows IKE Extension allows unauthorized attackers to execute code over a network, potentially causing a denial-of-service condition or gaining full control of 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 IKE Extension Use After Free (CVE-2026-33824) 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: Microsoft Windows Operating System.
Attack Information: Microsoft Windows IKE Extension Use After Free (CVE-2026-33824)