---
id: CVE-2026-87666
title: >-
  An OS command injection vulnerability exists in the time and zone management
  subsystem of Brocade Fabric OS versions before 9.2.2d and 10.0.0 through
  10.0.0a1
summary: >-
  An OS command injection vulnerability exists in the time and zone management
  subsystem of Brocade Fabric OS versions before 9.2.2d and 10.0.0 through
  10.0.0a1. When updating system timezone settings via the REST API or
  configuration down…
severity: high
cvss: 8
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-78
vendor: broadcom
product: fabric_operating_system
affected:
  - fabric_operating_system < 9.2.2d
  - 'fabric_operating_system >= 10.0.0, < 10.0.1'
patched:
  - fabric_operating_system 10.0.1
published: '2026-10-08'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T19:14:40.353'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-87666'
references:
  - url: 'https://support.broadcom.com/external/content/SecurityAdvisories/0/39149'
    label: sirt@brocade.com
tags:
  - nvd
  - cve.org
epss: 0.02572
epssPercentile: 0.85214
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-08T13:18:04.614530Z'
scores:
  nvd: 8
  cna: 8.6
ingestedAt: '2026-10-08T04:04:32.124Z'
---

## Overview

An OS command injection vulnerability exists in the time and zone management subsystem of Brocade Fabric OS versions before 9.2.2d and 10.0.0 through 10.0.0a1. When updating system timezone settings via the REST API or configuration download routines, the system fails to sanitize input values before processing them in underlying shell execution routines. An authenticated user with low-privilege administrative access can exploit this vulnerability by submitting a crafted timezone string containing shell metacharacters. Successful exploitation allows the attacker to escape the restricted management environment and execute arbitrary shell commands with elevated privileges.

## Affected

- `fabric_operating_system < 9.2.2d`
- `fabric_operating_system >= 10.0.0, < 10.0.1`

## Remediation

Upgrade past the affected range:

- `fabric_operating_system 10.0.1`