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CVE-2026-66148 SonicWall CVE debrief

Authenticated command injection vulnerability in GMS Command-Line Interface (CLI) 9.5.1 and earlier allows low-privileged local users to execute system commands with root privileges. This vulnerability, CVE-2026-66148, is considered medium severity with a CVSS score of 6.3. It was identified in the GMS CLI versions 9.5.1 and earlier, impacting local users who can execute system commands with elevated privileges. The vulnerability allows for potential exploitation by low-privileged users, emphasizing the need for verification of affected product deployments and implementation of compensating controls. System administrators and security teams should review official advisories and CVE records for detailed guidance on affected scope, severity, and remediation steps.

Vendor
SonicWall
Product
GMS
CVSS
MEDIUM 6.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-11
Original CVE updated
2026-08-28
Advisory published
2026-08-11
Advisory updated
2026-08-28

Who should care

System administrators and security teams responsible for GMS CLI installations, especially those with local user access, should verify affected product deployments exist in managed environments and assign an owner for follow-up. They should review compensating controls for exposed systems while remediation is scheduled and verified, and check relevant monitoring, detection, and logs for exposed assets that need extra review.

Technical summary

CVE-2026-66148 is an authenticated command injection vulnerability in GMS Command-Line Interface (CLI) versions 9.5.1 and earlier. The vulnerability allows low-privileged local users to execute system commands with root privileges. The CVSS score is 6.3, indicating a medium severity vulnerability.

Defensive priority

Medium priority due to local attack vector and root privilege escalation

Recommended defensive actions

  • Inventory GMS CLI installations and verify version
  • Restrict local access to GMS CLI
  • Implement compensating controls for local privilege escalation
  • Monitor system commands for suspicious activity
  • Apply vendor remediation when available

Evidence notes

Evidence from official CVE Program record and NIST NVD detail page. Limited information available on affected products and versions. The CVE record was published on 2026-08-11T21:17:49.287Z and has not been modified since then. Affected product deployments need verification. Defenders should review official advisories for scope, severity, and guidance.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-66148 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-66148

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

  • CVE-2026-66148 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-66148

    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.