Check Point Advisories

Honeywell IQ4x Authentication Bypass (CVE-2026-3611)

Check Point Reference: CPAI-2026-1757
Date Published: 16 Mar 2026
Severity: High
Last Updated: Monday 16 March, 2026
Source:
Industry Reference:CVE-2026-3611
Protection Provided by:

Security Gateway
R81, R80, R77, R75
Who is Vulnerable? Honeywell IQ4x
Vulnerability Description An authentication bypass vulnerability in Honeywell IQ4x allows remote attackers to create a new account with administrative read/write permissions, enabling the user module and imposing authentication under attacker-controlled credentials. This action can effectively lock legitimate operators out of local and web-based configuration and administration.

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 Honeywell IQ4x Authentication Bypass (CVE-2026-3611) 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:  Application Servers Protection Violation.
Attack Information:  Honeywell IQ4x Authentication Bypass (CVE-2026-3611)

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