Check Point Advisories

D-Link Multiple Products Authentication Bypass (CVE-2026-4194)

Vulnerability
Protection

Check Point Reference:	CPAI-2026-12831
Date Published:	30 Sep 2026
Severity:	Critical
Last Updated:	Wednesday 30 September, 2026
Source:
Industry Reference:	CVE-2026-4194
Protection Provided by:	Security Gateway R82, R81, R80, R77, R75
Who is Vulnerable?	D-Link DNS-120 20260205 D-Link DNR-202L 20260205 D-Link DNS-315L 20260205 D-Link DNS-320 20260205 D-Link DNS-320L 20260205 D-Link DNS-320LW 20260205 D-Link DNS-321 20260205 D-Link DNR-322L 20260205 D-Link DNS-323 20260205 D-Link DNS-325 20260205 D-Link DNS-326 20260205 D-Link DNS-327L 20260205 D-Link DNR-326 20260205 D-Link DNS-340L 20260205 D-Link DNS-343 20260205 D-Link DNS-345 20260205 D-Link DNS-726-4 20260205 D-Link DNS-1100-4 20260205 D-Link DNS-1200-05 20260205 D-Link DNS-1550-04 20260205
Vulnerability Description	A authentication bypass vulnerability in D-Link products allows remote attackers to manipulate access controls and exploit the 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 R82 / R81 / R80 / R77 / R75

In the IPS tab, click Protections and find the D-Link Multiple Products Authentication Bypass (CVE-2026-4194) 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: Application Servers Protection Violation.
Attack Information: D-Link Multiple Products Authentication Bypass (CVE-2026-4194)