Security readout for executives and security teams
Plain-English summary
SonicWall GMS 9.5.1 and earlier contains a critical flaw allowing an unauthenticated remote attacker to execute code through crafted requests to the Dispatcher Service. A successful attack could enable major system changes, service disruption, and limited data exposure. The supplied sources do not establish active exploitation.
Executive priority
Treat this as an immediate remediation priority because exploitation requires neither credentials nor user action and can result in remote code execution. Focus first on reachable GMS deployments. Do not represent exploitation as confirmed; the supplied evidence establishes severe technical risk but not active attacks.
Technical view
CVE-2026-66147 is a network-accessible command injection vulnerability in the SonicWall GMS Dispatcher Service. It requires no authentication or user interaction and has low attack complexity. The supplied CVSS 3.1 score is 9.4, with high integrity and availability impact, low confidentiality impact, and unchanged scope. It is classified as CWE-94.
Likely exposure
Organizations running SonicWall GMS 9.5.1 or earlier may be exposed where attackers can reach the Dispatcher Service. The source bundle does not identify affected ports, configurations, deployment defaults, or whether ordinary management-network isolation prevents access. Confirm product versions and actual network reachability.
Exploitation context
The vulnerability permits unauthenticated remote code execution through specially crafted requests. However, CVE-2026-66147 is not listed as KEV in the supplied bundle, and no cited source establishes exploitation in the wild, public exploit availability, or observed attack campaigns.
Researcher notes
The source bundle identifies command injection in the GMS Dispatcher Service but provides no vulnerable parameter, protocol detail, affected port, attack telemetry, or explicit remediation text. Avoid assuming exposure solely from version presence; validate service reachability and configuration. Consult the vendor advisory for authoritative remediation details.
Mitigation direction
- Review SonicWall advisory SNWLID-2026-0011 for the vendor-supported fix or upgrade path.
- Prioritize remediation for GMS 9.5.1 and earlier systems reachable from untrusted networks.
- Restrict Dispatcher Service access to authorized management networks while remediation is pending.
- Monitor affected systems for suspicious requests, unexpected processes, configuration changes, and service disruption.
Validation and detection
- Inventory SonicWall GMS deployments and record each installed version.
- Identify whether any deployment runs GMS 9.5.1 or an earlier release.
- Verify Dispatcher Service reachability from internet-facing and other untrusted network segments.
- Confirm the vendor-recommended remediation was applied and persists after restart.
- Review relevant service and system logs for unexplained activity around the disclosure date.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-94: Code execution behavior lookup
Code execution and unsafe deserialization weaknesses often justify reviewing execution behavior and process telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-66147 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H3.95.5CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
9.4CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2026-0011CVE reference, sonicwall · vendor-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Control of Generation of Code ('Code Injection')
Improper Control of Generation of Code ('Code Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.