Improper Handling of Unicode Encoding in SonicWall SMA 1000 - CVE-2026-4116
Published: April 8, 2026
Vulnerability identifier: #VU125519
CSH Severity: Low
CVSS v4: 2.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-4116
CWE-ID: CWE-176
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to bypass Workplace/Connect Tunnel TOTP authentication.
The vulnerability exists due to improper handling of unicode encoding in SonicWall SMA1000 series appliances when processing Workplace/Connect Tunnel authentication input. A remote user can use crafted unicode input to bypass Workplace/Connect Tunnel TOTP authentication.
Affected software
SonicWall SMA 1000
How to mitigate CVE-2026-4116
Install security update from vendor's website.
SonicWall SMA 1000 - addressed in versions 12.4.3-03387, 12.5.0-02624