CVE-2018-11138

Name: CVE-2018-11138
Creator: NVD / NIST
Published: 2018-05-31T18:29:00.557+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10Actively ExploitedEPSS 91.93%

Last modified Jun 17, 2026

CVE-2018-11138 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. CISA has confirmed active exploitation in the wild. EPSS estimates a 91.93% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

91.93%

99.8th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Apr 15, 2022.

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Quest	Kace System Management Appliance	8.0.318

References

https://www.coresecurity.com/advisories/quest-kace-system-management-appliance-multiple-vulnerabilitiesExploit, Technical Description, Third Party Advisory
https://www.exploit-db.com/exploits/44950/Exploit, Third Party Advisory, VDB Entry
https://www.coresecurity.com/advisories/quest-kace-system-management-appliance-multiple-vulnerabilitiesExploit, Technical Description, Third Party Advisory
https://www.exploit-db.com/exploits/44950/Exploit, Third Party Advisory, VDB Entry
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-11138US Government Resource

Timeline

Published: May 31, 2018
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-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.

How severe is CVE-2018-11138?

CVE-2018-11138 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 91.93% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2018-11138?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

How Strix Helps

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Source: NVD / NIST