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PatchSiren cyber security CVE debrief

CVE-2016-9683 Dell CVE debrief

CVE-2016-9683 is a critical command injection flaw in the SonicWall Secure Remote Access server web administrative interface. The vulnerable CGI component can pass an unsanitized script filename into system(), which can let a remote attacker run commands and obtain a shell as the nobody user. Public CVE disclosure is dated 2017-02-22.

Vendor
Dell
Product
CVE-2016-9683
CVSS
CRITICAL 9.8
CISA KEV
Not listed in stored evidence
Original CVE published
2017-02-22
Original CVE updated
2026-05-13
Advisory published
2017-02-22
Advisory updated
2026-05-13

Who should care

Administrators and security teams running SonicWall Secure Remote Access server version 8.1.0.2-14sv, especially any deployment exposing the web administrative interface to untrusted networks.

Technical summary

The issue affects the /cgi-bin/extensionsettings CGI used for internal configuration handling. According to the supplied description and NVD data, a multipart form request involving scripts is not properly escaped; the scriptname filename is read unsanitized before a system() call, enabling remote command injection. NVD lists the weakness as CWE-77 and the CVSS vector as CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Defensive priority

Urgent. The combination of network reachability, no privileges required, and full confidentiality/integrity/availability impact makes this a high-priority exposure to verify and remediate.

Recommended defensive actions

  • Confirm whether any SonicWall Secure Remote Access server instance is running version 8.1.0.2-14sv or another affected build.
  • Apply the vendor remediation referenced in the SonicWall release notes / resolved issues documentation linked in the CVE record.
  • Restrict access to the web administrative interface to trusted management networks only until remediation is complete.
  • Monitor for unexpected process execution, anomalous CGI activity, and suspicious shell access under low-privilege accounts such as nobody.
  • Review vendor PSIRT guidance for SNWLID-2016-0004 and validate that the affected component is no longer exposed.

Evidence notes

This debrief is based only on the supplied CVE/NVD corpus and the referenced vendor/NVD links. The technical description, affected version, CWE-77 mapping, and CVSS vector come from the provided CVE metadata and NVD reference set. No exploit steps or weaponized reproduction details are included.

Official resources

Public CVE disclosure date supplied with the record: 2017-02-22T05:59:00.200Z. Vendor references in the CVE metadata point to SonicWall PSIRT SNWLID-2016-0004 and related release notes.