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Sonicwall CVE-2026-4116

| EUVD-2026-20908 HIGH
Improper Handling of Unicode Encoding (CWE-176)
2026-04-09 sonicwall GHSA-98v3-fwpf-r4w2
Authentication Bypass Sonicwall
7.2
CVSS 3.1
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CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

4
Analysis Generated
Apr 15, 2026 - 12:29 vuln.today
CVSS changed
Apr 13, 2026 - 19:37 NVD
7.2 (HIGH)
EUVD ID Assigned
Apr 09, 2026 - 15:00 euvd
EUVD-2026-20908
CVE Published
Apr 09, 2026 - 14:27 nvd
N/A

DescriptionNVD

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

AnalysisAI

Two-factor authentication bypass in SonicWall SMA1000 SSL-VPN allows remote attackers with valid SSLVPN credentials to circumvent TOTP requirements via Unicode encoding manipulation. Affects SMA1000 versions 12.5.0-02283 and 12.4.3-03245 and earlier. …

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RemediationAI

24 hours: Inventory all SonicWall SMA1000 appliances and document current firmware versions; contact SonicWall support for patch availability timeline and interim security advisories. 7 days: Implement network segmentation to restrict VPN appliance administrative access to authorized networks only; enable detailed audit logging for all administrative authentication events on affected devices. …

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CVE-2026-4116 vulnerability details – vuln.today
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