CVE-2018-9866

CRITICAL

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....

Affects 1 product across 1 vendor.

BCS7.75
CVSS 3.19.8
EPSS4.5%
Percentile91th
PatchUnknown
CVSS Vector — Plain English Remotely exploitable over the network, low complexity, no authentication required, no user interaction needed, impact contained to the vulnerable component, full confidentiality impact, full integrity impact, full availability impact.
CWE Weakness Definitions
CWE-20: Improper Input Validation

Software does not validate or incorrectly validates input, allowing attackers to craft data processed in unintended ways.

CWE-77: Command Injection

Attacker injects operating system commands through application inputs passed to a shell or system call.

Related Attack Patterns (CAPEC)
CAPEC-3 Using Leading 'Ghost' Character Sequences to Bypass Input Filters
via CWE-20
CAPEC-7 Blind SQL Injection
via CWE-20
CAPEC-8 Buffer Overflow in an API Call
via CWE-20
CAPEC-9 Buffer Overflow in Local Command-Line Utilities
via CWE-20
CAPEC-10 Buffer Overflow via Environment Variables
via CWE-20
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via CWE-20
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via CWE-77
via CWE-20
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via CWE-20
via CWE-77
via CWE-20
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via CWE-20
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via CWE-77
via CWE-20
via CWE-20
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via CWE-77
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via CWE-20
via CWE-77

Mapping is CWE-to-CAPEC per MITRE CAPEC 3.9.

◆ AI Analysis — automated analysis, not human-reviewed

This vulnerability was disclosed in 2018. A critical vulnerability affects Sonicwall systems (CVE-2018-9866). No public exploit code is currently available. Isolate affected systems if patching is not feasible.

BSID: BS-2018-GLOBAL-220762-C • Model: rule-based-v1 • Confidence: MEDIUM

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Frequently Asked Questions
What is CVE-2018-9866?
This vulnerability was disclosed in 2018. A critical vulnerability affects Sonicwall systems (CVE-2018-9866). No public exploit code is currently available. Isolate affected systems if patching is not feasible.
What is the CVSS score for CVE-2018-9866?
CVE-2018-9866 has CVSS 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS: 4.5%.
Is CVE-2018-9866 actively exploited?
No confirmed active exploitation of CVE-2018-9866 as of 2026-06-20.
How do I remediate CVE-2018-9866?
Priority: MEDIUM. PSIRT: [email protected]
What systems are affected by CVE-2018-9866?
CVE-2018-9866 affects: Sonicwall.
Vulnerability Details
CVE IDCVE-2018-9866
BSIDBS-2018-GLOBAL-220762-C BreachSpider Global ID
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published2018-08-03
Last Modified2026-06-17
ICS Relevance80%
Weakness (CWE)
Improper Input ValidationCommand Injection
Domains
NETWORK-INFRA
SourceNVD
Official Description

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.

Source: NIST NVD / MITRE CVE Database

Attack Vector Analysis — CITED Relevance

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

Exploitation Likelihood: LOW

Affected Products
VendorProductFixed Version
Sonicwall Global Management System —
Remediation

No patch URL on record. Monitor vendor security advisories directly.

Vendor PSIRT: [email protected]
Threat Intelligence
● Threat Intelligence Validated: September 2026 | Threat Age: 2977 Days
CISA KEVNot in KEV catalog
Public ExploitNot confirmed
PoC CodeNot confirmed
AI Enrichment Record — provenance & audit hash
Modelrule-based-v1
ConfidenceMEDIUM
Enriched At2026-05-24
SHA-512 Audit Hash5e2edcd2dd6aed12aa78a18bd103221eb9aab8b20a21ee1df91d048713f1da9f208ff150ec4ca4ab4380197131da183793ad86a6f78a5c4ff11dbbabcf3f9ed0
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