---
id: CVE-2026-85421
title: >-
  A critical security vulnerability has been identified in Brocade ASCG versions
  before 3.5.0
summary: >-
  A critical security vulnerability has been identified in Brocade ASCG versions
  before 3.5.0. The HTTPS service fails to properly enforce authentication or
  access control checks on incoming requests. An unauthenticated attacker with
  netwo…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-306
vendor: broadcom
product: brocade_active_support_connectivity_gateway
affected:
  - brocade_active_support_connectivity_gateway < 3.5.0
patched:
  - brocade_active_support_connectivity_gateway 3.5.0
published: '2026-10-08'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T18:46:28.640'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-85421'
references:
  - url: 'https://support.broadcom.com/external/content/SecurityAdvisories/0/38378'
    label: sirt@brocade.com
tags:
  - nvd
  - cve.org
epss: 0.00222
epssPercentile: 0.12739
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-08T17:49:38.267542Z'
scores:
  nvd: 8.8
  cna: 8.7
ingestedAt: '2026-10-08T07:18:54.847Z'
---

## Overview

A critical security vulnerability has been identified in Brocade ASCG versions before 3.5.0. The HTTPS service fails to properly enforce authentication or access control checks on incoming requests. An unauthenticated attacker with network access can issue control commands, alter cluster states, and modify system configurations, leading to a complete compromise of the streaming service control plane.

## Affected

- `brocade_active_support_connectivity_gateway < 3.5.0`

## Remediation

Upgrade past the affected range:

- `brocade_active_support_connectivity_gateway 3.5.0`