Is CVE-2018-9866 actively exploited?

Yes. KEV Intelligence tracks CVE-2018-9866 as a known exploited vulnerability. Confidence is high.

What exploitation activity has KEV Intelligence observed?

KEV Intelligence has not yet recorded sensor-observed exploitation attempts for CVE-2018-9866. Our sensors continue to monitor for activity targeting this CVE.

Which versions are affected?

CVE-2018-9866 affects SonicWall Global Management System (GMS). Reported affected version: 8.1 and earlier.

No. CVE-2018-9866 is not currently listed in CISA KEV.

Vulnerability report

Exploited in the wild High confidence Not in CISA KEV

CVE-2018-9866

Global Management System (GMS)

SonicWall / Global Management System (GMS) · 8.1 and earlier

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Severity: CVSS 9.8 · Critical
Confidence: High
Exploit status: Exploited in the wild
EPSS: 4.5%
First observed: —
Last observed: —

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2018-9866 is an unauthenticated vulnerability affecting SonicWall Global Management System (GMS). A vulnerability in lack of validation of user-supplied parameters pass to XML-RPC calls on SonicWall Global...

Is it exploited?

Yes. KEV Intelligence tracks this CVE as a known exploited vulnerability. Confidence is high.

Who is affected?

SonicWall / Global Management System (GMS) 8.1 and earlier.

What should we do?

Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.

Overview

Global Management System (GMS)

A vulnerability in lack of validation of user-supplied parameters pass to XML-RPC calls on SonicWall Global Management System (GMS) virtual appliance's, allow remote user to execute arbitrary code.

This vulnerability affected GMS version 8.1 and earlier.

Vendor Product Affected Status

SonicWall Global Management System (GMS) 8.1 and earlier Affected

Published: 03 Aug 2018
Exploitation Reported: 26 Apr 2025
Attack vector: Remote
Complexity: Low
Privileges: None
User interaction: None

CVE References

CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2018-9866
twitter.com/ddouhine/status/1019251292202586112 twitter.com · CVE Record https://twitter.com/ddouhine/status/1019251292202586112
GitHub — rapid7/metasploit-framework github.com · CVE Record https://github.com/rapid7/metasploit-framework/pull/10305
psirt.global.sonicwall.com/vuln-detail/SNWLID-2018-0007 psirt.global.sonicwall.com · CVE Record https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2018-0007

Exploitation evidence

Why KEV Intelligence marks this CVE as exploited

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploited in the wild

The Shadowserver

Recorded 26 Apr 2025

Independent exploitation attestation added to the KEV Intelligence record.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the KEV Intelligence Pro API.

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Source	Added
The Shadowserver First	2025-04-26 00:00 UTC

Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets: 0
User-Agents: 0

Raw values available in Pro and Enterprise.

Scanner coverage

No scanner integrations recorded yet.

Virtual patch status

No KEV Intelligence virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

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No detection artifacts or sensor request patterns are available for this CVE yet.

Check back as sensor telemetry and scanner integrations are updated.

Risk and context

Severity, weaknesses, and research context

CVSS v3.1

9.8 Critical

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

EPSS

4.5%

Weaknesses

Improper Neutralization of Special Elements used in a Command ('Command Injection') CWE-77

All CVSS Scores

CVSS v3.1 9.8 Critical

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

CVSS v3.0 9.8 Critical

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v2.0 7.5 High

AV:N/AC:L/Au:N/C:P/I:P/A:P

Timeline

From disclosure to observed exploitation

26 Apr 2025
Added to KEV Intelligence KEV Feed

High-confidence, third-party attested exploitation
03 Aug 2018
CVE published

Vulnerability disclosed publicly
09 Apr 2018
CVE ID reserved

Identifier reserved by the CNA

Pro API

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Evidence confidence and provenance
First-party sensor telemetry
PoC and scanner references
Affected versions and enrichment
Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2018-9866

Free JSON includes basic KEV fields

{
  "cve_id": "CVE-2018-9866",
  "confidence": "High",
  "cvss_score": 9.8,
  "cvss_estimated": false,
  "epss_score": 0.04504,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "attempts": 0, "sensors": 0 }
}

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CVE-2018-9866

Global Management System (GMS)

Tags

CVE References

Exploited in the wild

Known exploited vulnerability sources

Observed signals

Scanner coverage

Virtual patch status

Weaknesses

All CVSS Scores

Added to KEV Intelligence KEV Feed

CVE published

CVE ID reserved

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