---
id: CVE-2018-11138
title: >-
  The '/common/download_agent_installer.php' script in the Quest KACE System
  Management Appliance 8.0.318 is accessible by anonymous users and can be
  abused to execute arbitrary commands on the system.
summary: >-
  The '/common/download_agent_installer.php' script in the Quest KACE System
  Management Appliance 8.0.318 is accessible by anonymous users and can be
  abused to execute arbitrary commands on the system.
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'
cwe:
  - CWE-78
  - CWE-78
vendor: quest
product: kace_system_management_appliance
affected:
  - kace_system_management_appliance = 8.0.318
published: '2018-05-31'
updated: '2026-08-13'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2018-11138'
references:
  - url: >-
      https://www.coresecurity.com/advisories/quest-kace-system-management-appliance-multiple-vulnerabilities
    label: cve@mitre.org
  - url: 'https://www.exploit-db.com/exploits/44950/'
    label: cve@mitre.org
  - url: >-
      https://www.coresecurity.com/advisories/quest-kace-system-management-appliance-multiple-vulnerabilities
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://www.exploit-db.com/exploits/44950/'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-11138
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - kev
  - in-the-wild
  - exploit-available
epss: 0.92061
epssPercentile: 0.99819
kev: true
kevDateAdded: '2022-03-25'
kevDueDate: '2022-04-15'
kevRansomware: true
exploited: true
exploitAvailable: true
ingestedAt: '2026-08-13T06:00:54.328Z'
exploits:
  exploitdb: true
  metasploit:
    - exploit/unix/http/quest_kace_systems_management_rce
  nuclei:
    - CVE-2018-11138
  checkedAt: '2026-09-21T15:23:37.755Z'
---

## Overview

The '/common/download_agent_installer.php' script in the Quest KACE System Management Appliance 8.0.318 is accessible by anonymous users and can be abused to execute arbitrary commands on the system.

## Affected

- `kace_system_management_appliance = 8.0.318`

## Remediation

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