CVE-2026-66147

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Unauthenticated Command Injection in GMS Dispatcher Service

Publication date: 2026-08-11

Last updated on: 2026-08-28

Assigner: SonicWALL, Inc.

Description

An unauthenticated command injection vulnerability was identified in the GMS Dispatcher Service in GMS 9.5.1 and earlier versions which allows remote attacker to perform remote code execution through specially crafted requests.

CVSS Scores

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Meta Information

Published

2026-08-11

Last Modified

2026-08-28

Generated

2026-09-01

AI Q&A

2026-08-12

EPSS Evaluated

2026-08-30

NVD

CVE-2026-66147

EUVD

EUVD-2026-56941

Affected Vendors & Products

Vendor	Product	Version / Range
sonicwall	gms	to 9.5.1 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-94	The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.

Attack-Flow Graph

Executive Summary

This vulnerability is an unauthenticated command injection flaw in the GMS Dispatcher Service affecting GMS 9.5.1 and earlier versions. It allows remote attackers to execute arbitrary commands on the system by sending specially crafted requests without needing authentication.

Detection Guidance

This vulnerability involves unauthenticated command injection in GMS Dispatcher Service. To detect it, monitor network traffic for suspicious requests targeting the service, particularly those with unusual payloads or commands. Check logs for signs of remote code execution attempts or unexpected system behavior.

Impact Analysis

An attacker could exploit this to gain full control over the affected system, install malware, steal data, or disrupt services. Since it requires no authentication, any exposed system running vulnerable GMS software is at high risk of remote compromise.

Compliance Impact

This vulnerability could lead to unauthorized access and data breaches, violating GDPR and HIPAA requirements for data protection and access controls. Organizations may face fines, legal penalties, and reputational damage if exploited.

Mitigation Strategies

Immediately update GMS to a version later than 9.5.1 to patch the command injection vulnerability. If an update is not available, consider disabling the GMS Dispatcher Service or restricting network access to it until a patch is applied.

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