---
id: CVE-2026-65184
title: Avocent ACS8000 wsserver command injection
summary: >-
  The root-privileged `wsserver` terminal-bridge daemon builds a shell command
  from client-supplied WebSocket fields and passes it to `system()` and
  `popen()` without quoting, escaping, or character-set validation. The daemon's
  public-key …
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-78
vendor: Vertiv
product: Avocent ACS8000
affected:
  - avocent_acs8000 <= 2.32.4
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-10-26T15:35:25.917894Z'
published: '2026-10-26'
updated: '2026-10-26'
sourceUpdated: '2026-10-26T16:46:46.017Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-65184'
references:
  - url: >-
      https://www.runzero.com/advisories/avocent-acs8000-wsserver-cmdinj-cve-2026-65184
  - url: 'https://www.runzero.com/blog/lights-out-exposed/'
tags:
  - cve.org
ingestedAt: '2026-10-26T15:29:30.538Z'
---

## Overview

The root-privileged `wsserver` terminal-bridge daemon builds a shell command from client-supplied WebSocket fields and passes it to `system()` and `popen()` without quoting, escaping, or character-set validation. The daemon's public-key session path performs no appliance-session check.

## Affected

- `avocent_acs8000 <= 2.32.4`

## Remediation

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