CVE-2026-4116 | SonicWall SMA1000 Tunnel TOTP Authentication unicode encoding (SNWLID-2026-0003)

VDB-356588 · CVE-2026-4116 · SNWLID-2026-0003 SONICWALL SMA1000 TUNNEL TOTP AUTHENTICATION UNICODE ENCODING HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 6.3 $0-$5k 0.61+ Summaryinfo A vulnerability categorized as critical has been discovered in SonicWall SMA1000. Affected by this issue is some unknown functionality of the component Tunnel TOTP Authentication. Such manipulation leads to improper handling of unicode encoding. This vulnerability is listed as CVE-2026-4116. The attack may be performed from remote. There is no available exploit. Detailsinfo A vulnerability was found in SonicWall SMA1000 (affected version unknown). It has been rated as critical. Affected by this issue is an unknown functionality of the component Tunnel TOTP Authentication. The manipulation with an unknown input leads to a improper handling of unicode encoding vulnerability. Using CWE to declare the problem leads to CWE-176. The product does not properly handle when an input contains Unicode encoding. Impacted is confidentiality, integrity, and availability. CVE summarizes: Improper handling of Unicode encoding in SonicWall SMA1000 series appliances allows a remote authenticated SSLVPN user to bypass Workplace/Connect Tunnel TOTP authentication. The advisory is shared for download at psirt.global.sonicwall.com. This vulnerability is handled as CVE-2026-4116 since 03/13/2026. The exploitation is known to be easy. The attack may be launched remotely. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 04/09/2026). There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product. Productinfo Type Firewall Software Vendor SonicWall Name SMA1000 License commercial Website Vendor: https://www.sonicwall.com/ CPE 2.3info 🔒 CPE 2.2info 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 6.3 VulDB Meta Temp Score: 6.3 VulDB Base Score: 6.3 VulDB Temp Score: 6.3 VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Improper handling of unicode encoding CWE: CWE-176 / CWE-172 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: no mitigation known Status: 🔍 0-Day Time: 🔒 Timelineinfo 03/13/2026 CVE reserved 04/09/2026 +26 days Advisory disclosed 04/09/2026 +0 days VulDB entry created 04/09/2026 +0 days VulDB entry last update Sourcesinfo Vendor: sonicwall.com Advisory: SNWLID-2026-0003 Status: Confirmed CVE: CVE-2026-4116 (🔒) GCVE (CVE): GCVE-0-2026-4116 GCVE (VulDB): GCVE-100-356588 Entryinfo Created: 04/09/2026 17:37 Changes: 04/09/2026 17:37 (53) Complete: 🔍 Cache ID: 99:4BD:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸