---
id: CVE-2026-87660
title: >-
  An improper file permission and missing authorization vulnerability exists in
  the diagnostic kernel module subsystem of Brocade Fabric OS versions before
  9.2.2d and 10.0.0 through 10.0.0a1
summary: >-
  An improper file permission and missing authorization vulnerability exists in
  the diagnostic kernel module subsystem of Brocade Fabric OS versions before
  9.2.2d and 10.0.0 through 10.0.0a1. An unprivileged local user can invoke
  privilege…
severity: high
cvss: 7
cvssVector: 'CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N'
cwe:
  - CWE-732
vendor: Brocade
product: Fabric OS
affected:
  - fabric_os < 9.2.2d
  - fabric_os >= 10.0.0 <= 10.0.0a1
published: '2026-10-08'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T04:17:52.107'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-87660'
references:
  - url: 'https://support.broadcom.com/external/content/SecurityAdvisories/0/39155'
    label: sirt@brocade.com
tags:
  - nvd
  - cve.org
cvssSource: cna
ingestedAt: '2026-10-08T04:04:32.116Z'
---

## Overview

An improper file permission and missing authorization vulnerability exists in the diagnostic kernel module subsystem of Brocade Fabric OS versions before 9.2.2d and 10.0.0 through 10.0.0a1. An unprivileged local user can invoke privileged hardware tests, force system error conditions, reset hardware blades, or disrupt storage fabric operations.

## Remediation

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