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PatchSiren cyber security CVE debrief

CVE-2026-66147 SonicWall CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-08-11T21:17:49.173Z and has not been modified since then. This critical vulnerability, CVE-2026-66147, is an unauthenticated command injection vulnerability in the GMS Dispatcher Service of GMS 9.5.1 and earlier versions. It allows remote attackers to perform remote code execution through specially crafted requests. The vulnerability has a CVSS score of 9.4, indicating a critical severity level. Administrators of GMS 9.5.1 and earlier versions, Sonicwall users, and security teams responsible for vulnerability management and patching should be aware of this critical vulnerability and take immediate action to protect their systems. Evidence of exploitation is limited, and defenders should verify the integrity of their GMS deployments and monitor for suspicious activity. The vendor is working on a remediation plan. There is a high likelihood of this vulnerability being exploited, which could lead to significant operational impact if not addressed promptly.

Vendor
SonicWall
Product
GMS
CVSS
CRITICAL 9.4
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

Administrators of GMS 9.5.1 and earlier versions, Sonicwall users, and security teams responsible for vulnerability management and patching should be aware of this critical vulnerability and take immediate action to protect their systems. This vulnerability has a high likelihood of being exploited and could lead to significant operational impact if not addressed promptly.

Technical summary

The unauthenticated command injection vulnerability in GMS 9.5.1 and earlier versions allows remote attackers to perform remote code execution through specially crafted requests. This vulnerability affects the GMS Dispatcher Service and has a CVSS score of 9.4, indicating a critical vulnerability. Sonicwall users and administrators of GMS 9.5.1 and earlier versions should take immediate action to patch or mitigate this vulnerability.

Defensive priority

Critical vulnerability in GMS Dispatcher Service allows remote code execution; immediate patching recommended.

Recommended defensive actions

  • Apply vendor patch for GMS 9.5.1 and earlier versions
  • Restrict access to GMS Dispatcher Service
  • Monitor for suspicious requests
  • Review compensating controls for exposed systems while remediation is scheduled and verified
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE-2026-66147 vulnerability is an unauthenticated command injection vulnerability in the GMS Dispatcher Service of GMS 9.5.1 and earlier versions. This allows a remote attacker to perform remote code execution through specially crafted requests. Evidence of exploitation is limited, and defenders should verify the integrity of their GMS deployments and monitor for suspicious activity. The vendor is working on a remediation plan.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-66147 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-66147

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

  • CVE-2026-66147 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-66147

    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.