Check Point Advisories

Apache Log4j Insecure Deserialization

Vulnerability
Protection

Check Point Reference:	CPAI-2026-10909
Date Published:	31 Aug 2026
Severity:	Critical
Last Updated:	Tuesday 01 September, 2026
Source:
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Apache log4j-api 2.11.0 up to 2.26.1 Apache log4j-core 2.8.0 up to 2.26.1
Vulnerability Description	An insecure deserialization vulnerability exists in Apache Log4j. 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 Apache Log4j Insecure Deserialization 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: Apache Server Protection Violation.
Attack Information: Apache Log4j Insecure Deserialization