CVE-2026-4116: CWE-176 Improper handling of unicode encoding in SonicWall SMA1000
Improper handling of Unicode encoding in SonicWall SMA1000 series appliances allows a remote authenticated SSLVPN user to bypass Workplace/Connect Tunnel TOTP authentication.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-4116) arises from improper handling of Unicode encoding (CWE-176) in SonicWall SMA1000 appliances. It permits a remote authenticated SSLVPN user to bypass the Time-based One-Time Password (TOTP) authentication used in the Workplace/Connect Tunnel, potentially weakening multi-factor authentication controls. Affected versions include 12.4.3-03245 (platform-hotfix) and earlier, and 12.5.0-02283 (platform-hotfix) and earlier. No CVSS score or vendor remediation details are currently available.
Potential Impact
The vulnerability allows bypassing of TOTP authentication for SSLVPN users, which could reduce the effectiveness of multi-factor authentication and potentially allow unauthorized access to VPN resources by authenticated users. However, exploitation requires prior authentication to the SSLVPN, limiting the scope to authenticated users. There are no known active exploits reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, organizations should consider additional compensating controls such as monitoring authenticated VPN sessions for unusual activity and restricting VPN access to trusted users. Do not assume the vulnerability is mitigated without vendor confirmation.
CVE-2026-4116: CWE-176 Improper handling of unicode encoding in SonicWall SMA1000
Description
Improper handling of Unicode encoding in SonicWall SMA1000 series appliances allows a remote authenticated SSLVPN user to bypass Workplace/Connect Tunnel TOTP authentication.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-4116) arises from improper handling of Unicode encoding (CWE-176) in SonicWall SMA1000 appliances. It permits a remote authenticated SSLVPN user to bypass the Time-based One-Time Password (TOTP) authentication used in the Workplace/Connect Tunnel, potentially weakening multi-factor authentication controls. Affected versions include 12.4.3-03245 (platform-hotfix) and earlier, and 12.5.0-02283 (platform-hotfix) and earlier. No CVSS score or vendor remediation details are currently available.
Potential Impact
The vulnerability allows bypassing of TOTP authentication for SSLVPN users, which could reduce the effectiveness of multi-factor authentication and potentially allow unauthorized access to VPN resources by authenticated users. However, exploitation requires prior authentication to the SSLVPN, limiting the scope to authenticated users. There are no known active exploits reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, organizations should consider additional compensating controls such as monitoring authenticated VPN sessions for unusual activity and restricting VPN access to trusted users. Do not assume the vulnerability is mitigated without vendor confirmation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- sonicwall
- Date Reserved
- 2026-03-13T12:13:43.715Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d7bccb1cc7ad14dad7b13a
Added to database: 4/9/2026, 2:50:51 PM
Last enriched: 4/9/2026, 3:06:37 PM
Last updated: 4/10/2026, 7:57:44 AM
Views: 7
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