Authentication Bypass via Unicode Handling in SonicWall SMA

Publication date: 2026-04-09

Last updated on: 2026-05-10

Assigner: SonicWALL, Inc.

Description

Improper handling of Unicode encoding in SonicWall SMA1000 series appliances allows a remote authenticated SSLVPN admin to bypass AMC TOTP authentication.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-04-09

Last Modified

2026-05-10

Generated

2026-07-06

AI Q&A

2026-04-09

EPSS Evaluated

2026-07-05

NVD

CVE-2026-4114

EUVD

EUVD-2026-20906

Affected Vendors & Products

Vendor	Product	Version / Range
sonicwall	sma1000	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-176	The product does not properly handle when an input contains Unicode encoding.

Attack-Flow Graph

Executive Summary

This vulnerability involves improper handling of Unicode encoding in SonicWall SMA1000 series appliances. It allows a remote authenticated SSLVPN administrator to bypass AMC TOTP (Time-based One-Time Password) authentication.

Impact Analysis

An attacker who is a remote authenticated SSLVPN administrator can bypass the AMC TOTP authentication mechanism. This could potentially allow unauthorized access to systems or data that rely on this two-factor authentication for security.

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