Check Point Advisories

Cisco Catalyst SD-WAN Manager Authentication Bypass (CVE-2026-76504)

Check Point Reference: CPAI-2026-13370
Date Published: 1 Oct 2026
Severity: Critical
Last Updated: Thursday 01 October, 2026
Source:
Industry Reference:CVE-2026-76504
Protection Provided by:

Security Gateway
R82, R81, R80, R77, R75
Who is Vulnerable? Cisco Catalyst SD-WAN Manager 18.3.6
Cisco Catalyst SD-WAN Manager 18.3.7
Cisco Catalyst SD-WAN Manager 18.3.8
Cisco Catalyst SD-WAN Manager 17.2.10
Cisco Catalyst SD-WAN Manager 18.3.6.1
Cisco Catalyst SD-WAN Manager 18.2.0
Cisco Catalyst SD-WAN Manager 18.4.3
Cisco Catalyst SD-WAN Manager 18.4.1
Cisco Catalyst SD-WAN Manager 17.2.8
Cisco Catalyst SD-WAN Manager 18.3.3.1
Cisco Catalyst SD-WAN Manager 18.4.0
Cisco Catalyst SD-WAN Manager 18.3.1
Cisco Catalyst SD-WAN Manager 17.2.6
Cisco Catalyst SD-WAN Manager 17.2.9
Cisco Catalyst SD-WAN Manager 18.3.4
Cisco Catalyst SD-WAN Manager 17.2.5
Cisco Catalyst SD-WAN Manager 18.3.1.1
Cisco Catalyst SD-WAN Manager 18.3.5
Cisco Catalyst SD-WAN Manager 18.4.0.1
Cisco Catalyst SD-WAN Manager 18.3.3
Cisco Catalyst SD-WAN Manager 17.2.7
Cisco Catalyst SD-WAN Manager 17.2.4
Cisco Catalyst SD-WAN Manager 18.3.0
Vulnerability Description A authentication bypass vulnerability in Cisco Catalyst SD-WAN Manager allows remote attackers to gain access to the API as the admin user by sending a crafted HTTP request that bypasses authentication rules.

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

  1. In the IPS tab, click Protections and find the Cisco Catalyst SD-WAN Manager Authentication Bypass (CVE-2026-76504) 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:  Cisco Protection Violation.
Attack Information:  Cisco Catalyst SD-WAN Manager Authentication Bypass (CVE-2026-76504)

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