---
id: CVE-2026-87663
title: >-
  An authentication bypass and command injection vulnerability exists in the
  inter-switch remote execution service of Brocade Fabric OS versions before
  9.2.2d and 10.0.0 through 10.0.0a1
summary: >-
  An authentication bypass and command injection vulnerability exists in the
  inter-switch remote execution service of Brocade Fabric OS versions before
  9.2.2d and 10.0.0 through 10.0.0a1. When processing remote command execution
  IPC frames…
severity: high
cvss: 7.1
cvssVector: 'CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'
cwe:
  - CWE-290
vendor: Brocade
product: Fabric OS
affected:
  - fabric_os < 9.2.2d
  - fabric_os >= 10.0.0 <= 10.0.0a1
published: '2026-10-08'
updated: '2026-10-09'
sourceUpdated: '2026-10-09T04:18:13.310'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-87663'
references:
  - url: 'https://support.broadcom.com/external/content/SecurityAdvisories/0/39163'
    label: sirt@brocade.com
tags:
  - nvd
  - cve.org
epss: 0.00735
epssPercentile: 0.53033
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-08T15:18:59.184408Z'
cvssSource: cna
ingestedAt: '2026-10-08T05:05:36.682Z'
---

## Overview

An authentication bypass and command injection vulnerability exists in the inter-switch remote execution service of Brocade Fabric OS versions before 9.2.2d and 10.0.0 through 10.0.0a1. When processing remote command execution IPC frames across the fabric, the receiving switch processes these commands at an elevated processing level without proper verification of transmitted parameters. This allows an attacker on a single fabric-connected switch to escalate privileges and execute arbitrary root commands locally or across other managed fabric members where remote execution functionality is enabled.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.