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PatchSiren cyber security CVE debrief

CVE-2026-4116 SonicWall CVE debrief

CVE-2026-4116: SonicWall SMA1000 series appliances have an improper handling of Unicode encoding vulnerability. A remote authenticated SSLVPN user can bypass Workplace/Connect Tunnel TOTP authentication. The CVSS score is 7.2, indicating high severity. This vulnerability affects the SonicWall SMA1000 series appliances, allowing attackers to bypass authentication mechanisms. Defenders should assess exposure and prioritize remediation efforts to prevent potential authentication bypass. The vulnerability has a high CVSS score, emphasizing the need for prompt action.

Vendor
SonicWall
Product
SMA1000
CVSS
HIGH 7.2
CISA KEV
Not listed in stored evidence
Original CVE published
2026-04-09
Original CVE updated
2026-10-26
Advisory published
2026-04-09
Advisory updated
2026-10-26

Who should care

Defenders responsible for SonicWall SMA1000 series appliances, security teams, and administrators should assess exposure and prioritize remediation.

Why it matters

CVE-2026-4116 is a high-severity vulnerability in SonicWall SMA1000 series appliances that allows remote authenticated SSLVPN users to bypass Workplace/Connect Tunnel TOTP authentication. Defenders should prioritize verifying and updating affected appliances to prevent potential authentication bypass.

  • Defenders need to verify and update SonicWall SMA1000 series appliances to prevent potential authentication bypass.
  • Security teams should monitor SonicWall SMA1000 series appliances for suspicious activity.
  • Administrators should assess exposure and prioritize remediation for SonicWall SMA1000 series appliances.

Technical summary

The SonicWall SMA1000 series appliances have an improper handling of Unicode encoding vulnerability. This allows a remote authenticated SSLVPN user to bypass Workplace/Connect Tunnel TOTP authentication. The vulnerability is related to the handling of Unicode encoding in the affected appliances, which can be exploited by attackers to bypass authentication mechanisms. Defenders should prioritize verifying and updating affected appliances to prevent potential authentication bypass.

Defensive priority

Defenders should prioritize verifying and updating SonicWall SMA1000 series appliances to prevent potential authentication bypass.

Recommended defensive actions

  • Verify SonicWall SMA1000 series appliances are running a fixed version
  • Update SonicWall SMA1000 series appliances to the latest firmware
  • Monitor SonicWall SMA1000 series appliances for suspicious activity

Evidence notes

The CVE record and NVD vulnerability detail provide information on the vulnerability, its CVSS score, and affected products. The SonicWall SMA1000 series appliances are confirmed to be affected by this vulnerability. Evidence from the CVE Program and NVD detail pages supports the existence of this vulnerability. Defenders should verify and update affected appliances to prevent potential authentication bypass. The CVE record was published on 2026-04-09T15:16:14.010Z and has not been No

Sources and references

Verified primary and authoritative sources

  • CVE-2026-4116 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-4116

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-4116 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-4116

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.