CVE-2026-66149

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Code Injection in SonicWall Email Security Appliance

Publication date: 2026-08-11

Last updated on: 2026-08-28

Assigner: SonicWALL, Inc.

Description

Improper Control of Generation of Code ('Code Injection') Vulnerability in the SonicWall Email Security appliance allows an authenticated attacker with access to the SonicWall Email Security restricted CLI can inject arbitrary OS commands that execute as root via netmask.

CVSS Scores

EPSS Scores

Probability:
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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-2026-66149

EUVD

EUVD-2026-56946

Affected Vendors & Products

Vendor	Product	Version / Range
sonicwall	email_security	*

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 is a code injection vulnerability in SonicWall Email Security appliances. An authenticated attacker with access to the restricted CLI can inject malicious OS commands that run with root privileges by manipulating the netmask parameter.

Detection Guidance

To detect this vulnerability, check for unauthorized command execution attempts in SonicWall Email Security appliance logs. Look for suspicious netmask parameter modifications or unexpected root-level command invocations via CLI. Verify if any non-admin users have CLI access with restricted privileges.

Impact Analysis

An attacker could gain full control of the affected appliance, steal sensitive data, disrupt email services, or use it as a pivot point to compromise other systems in your network.

Compliance Impact

This vulnerability could lead to unauthorized access to personal or health data, violating GDPR and HIPAA requirements for data protection and access controls. Organizations may face fines or penalties for non-compliance.

Mitigation Strategies

Apply the latest SonicWall Email Security appliance updates or patches provided by SonicWall to address the code injection vulnerability. Restrict CLI access to authorized personnel only and review user permissions to ensure least privilege.

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