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Vulnerabilities

Vulnerability · CVE-2018-11138

Quest KACE System Management Appliance Remote Command Execution Vulnerability

Published May 31, 2018 · catalog updated Aug 12, 2026 · Quest KACE System Management Appliance

Patch now

CVE-2018-11138 is in the CISA known-exploited catalog, due Apr 15, 2022. Confirm Quest KACE System Management Appliance against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Severity
Critical9.8
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
91.72%
Remediation
Remediation guidance
Affected products
cpe quest/kace system management appliance · vendor Quest KACE System Management Appliance

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe quest/kace system management appliance8.0.318
  • vendor Quest KACE System Management Applianceversion unspecified

How to fix CVE-2018-11138

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2018-11138 is in the CISA known-exploited catalog, due Apr 15, 2022. Confirm Quest KACE System Management Appliance against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with quest/kace system management appliance 8.0.318. Apply updates per vendor instructions.

What should an analyst verify?

CWE-78: OS Command Injection. EPSS 91.72%. The CISA KEV listing is the exploitation evidence. A public exploit reference is linked in Sources. That is not the same as confirmed exploitation. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. May 31, 2018 · Catalog

    Detected

    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.

  2. Mar 25, 2022 · CISA KEV

    Known exploited

    Apply updates per vendor instructions.

  3. Apr 15, 2022 · CISA KEV

    Remediation due

    Apply updates per vendor instructions.

  4. Aug 12, 2026 · Catalog

    Updated

    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.

Sources

  • CISA KEVConfirmed exploitationCVE-2018-11138

    The '/common/download_agent_installer.php' script in the Quest KACE System Management Appliance is accessible by anonymous users and can be abused to perform remote code execution.

    cisa.gov
  • CVE.orgVulnerability recordCVE-2018-11138

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2018-11138

    30-day exploitation probability 91.7%

    first.org
  • Exploit DatabasePublic exploit reference44950

    Public archive entry. The exploit body is not stored here.

    exploit-db.com
  • Metasploit ModulesPublic exploit moduleexploit_unix/http/quest_kace_systems_management_rce

    Public module reference (excellent). Module source is not copied into this catalog.

    rapid7.com
  • NIST NVDVulnerability recordCVE-2018-11138

    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.

    nvd.nist.gov
  • VulnCheck KEVConfirmed exploitationCVE-2018-11138

    The '/common/download_agent_installer.php' script in the Quest KACE System Management Appliance is accessible by anonymous users and can be abused to perform remote code execution.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.