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SonicWall SMA1000 Mishandles Unicode Encoding in TOTP Validation, Allowing an Authenticated SSLVPN User to Bypass Two-Factor Authentication

Last refreshed2026-09-30

Status: UPDATED  |  Advisory ID: CVE-2026-4116

Key Details

CVECVE-2026-4116
CVSS Score / Version7.2 (High) / CVSS v3.1
Updated2026-06-17
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CVSS Proseattack vector is network; attack complexity is low; privileges required is high; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected productsSonicWall SMA6210 Firmware, SonicWall sma6200_firmware, SonicWall sma7200_firmware, SonicWall SMA7210 Firmware, and SonicWall SMA8200V
Classified asCWE-176 (Improper Handling of Unicode Encoding)

Affected Products, Subsystems & Sectors

VendorProductAffected VersionsPatch Status
SonicWallSMA6210 Firmware
SonicWallsma6200_firmware
SonicWallsma7200_firmware
SonicWallSMA7210 Firmware
SonicWallSMA8200V
SubsystemsIndustrial Network - Routers/Firewalls, PLC/PAC/RTU
SectorsMulti-sector

What to Know

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

What to Do

Monitor SonicWall's web page for any future patch releases. See vendor advisory link below.

References

SourceReference
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2026-4116
CVEhttps://www.cve.org/CVERecord?id=CVE-2026-4116
Vendor advisoryhttps://psirt.global.sonicwall.com/vuln-detail/SNWLID-2026-0003

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