SonicWall SMA1000 SSLVPN TOTP Bypass via Unicode Encoding Flaw
CVE-2026-4116 Published on April 9, 2026

Improper handling of Unicode encoding in SonicWall SMA1000 series appliances allows a remote authenticated SSLVPN user to bypass Workplace/Connect Tunnel TOTP authentication.

Vendor Advisory NVD

Vulnerability Analysis

CVE-2026-4116 is exploitable with network access, and requires user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.

Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
HIGH
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
HIGH
Availability Impact:
HIGH

Weakness Type

Improper Handling of Unicode Encoding

The software does not properly handle when an input contains Unicode encoding.


Affected Versions

SonicWall SMA1000:

Exploit Probability

EPSS
0.12%
Percentile
30.18%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.