How severe is CVE-2018-11138?

CVE-2018-11138 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-11138 being actively exploited?

Yes. CVE-2018-11138 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-03-25, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2018-11138?

CVE-2018-11138 affects Quest Kace System Management Appliance. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-11138?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2018-11138 have an EU (EUVD) identifier?

Yes. CVE-2018-11138 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2018-3180. It is also flagged as exploited in the EUVD (since 2022-03-25).

When was CVE-2018-11138 published?

CVE-2018-11138 was published on 2018-05-31 and last updated on 2026-08-13.

CVE-2018-11138

CVE-2018-11138 is a critical-severity vulnerability in Quest Kace System Management Appliance with a CVSS 3.x base score of 9.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2022-03-25). The underlying weakness is classified as CWE-78.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 92% (100th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2022-03-25)
EU (EUVD) id: EUVD-2018-3180
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2022-03-25)
Weakness: CWE-78
Affected product: Quest Kace System Management Appliance
Published: 2018-05-31
Last modified: 2026-08-13

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.

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 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-11138 being actively exploited?: Yes. CVE-2018-11138 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-03-25, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2018-11138?: CVE-2018-11138 affects Quest Kace System Management Appliance. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-11138?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2018-11138 have an EU (EUVD) identifier?: Yes. CVE-2018-11138 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2018-3180. It is also flagged as exploited in the EUVD (since 2022-03-25).
When was CVE-2018-11138 published?: CVE-2018-11138 was published on 2018-05-31 and last updated on 2026-08-13.

References

Affected products (1)

cpe:2.3:a:quest:kace_system_management_appliance:8.0.318:*:*:*:*:*:*:*

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CVE-2018-11141 — Critical (CVSS 9.8): The 'IMAGES_JSON' and 'attachments_to_remove[]' parameters of the '/adminui/advisory.php' script in the Quest KACE…
CVE-2018-11140 — Critical (CVSS 9.8): The 'reportID' parameter received by the '/common/run_report.php' script in the Quest KACE System Management Appliance…
CVE-2018-11136 — Critical (CVSS 9.8): The 'orgID' parameter received by the '/common/download_agent_installer.php' script in the Quest KACE System Management…
CVE-2018-11139 — High (CVSS 8.8): The '/common/ajax_email_connection_test.php' script in the Quest KACE System Management Appliance 8.0.318 is accessible…
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