Full Report
Multiple vulnerabilities have been discovered in SonicWall Global Management System (GMS), the most severe of which could allow for remote code execution. The SonicWall Global Management System (GMS) is a centralized management interface used to deploy and centrally manage SonicWall firewall, wireless, email security, secure remote access and Dell X-Series solutions from a single console. Successful exploitation of the most severe of these vulnerabilities could allow for remote code execution in the context of the affected service account. Depending on the privileges associated with the service account, an attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Services whose accounts are configured to have less rights on the system could be less impacted than those who operate with administrative user rights.
Analysis Summary
# Vulnerability: Multiple Critical Flaws in SonicWall Global Management System (GMS)
## CVE Details
- **CVE ID:** CVE-2026-66145, CVE-2026-66146, CVE-2026-66147, CVE-2026-66148, CVE-2026-66154, CVE-2026-18634
- **CVSS Score:** High/Critical (Specific scores not provided in advisory, but severe impact noted)
- **CWE:** CWE-20 (Improper Input Validation), CWE-78 (Command Injection), CWE-79 (XSS), CWE-502 (Insecure Deserialization)
## Affected Systems
- **Products:** SonicWall Global Management System (GMS)
- **Versions:** 9.5.1 and earlier versions
- **Configurations:** Virtual Appliance and Windows-based deployments.
## Vulnerability Description
SonicWall GMS is affected by several critical security flaws:
* **CVE-2026-66145:** Unauthenticated RCE via "ZipSlip" (arbitrary file write) and sensitive data exposure.
* **CVE-2026-66147:** Unauthenticated command injection via specially crafted network requests.
* **CVE-2026-18634:** Insecure handling of serialized objects allowing local attackers to perform unauthorized actions.
* **CVE-2026-66148:** Authenticated command injection allowing a low-privileged user to escalate to root/system privileges.
* **CVE-2026-66146:** Multiple Cross-Site Scripting (XSS) vulnerabilities.
* **CVE-2026-66154:** Insufficient certificate validation in privileged workflows, susceptible to Man-in-the-Middle (MitM) attacks.
## Exploitation
- **Status:** Not currently reported as exploited in the wild.
- **Complexity:** Low to Medium (depending on the specific CVE).
- **Attack Vector:** Network (Remote) for the most severe flaws; Local for privilege escalation.
## Impact
- **Confidentiality:** High (Ability to read sensitive data and system files).
- **Integrity:** High (Ability to write arbitrary files and modify system configurations).
- **Availability:** High (Potential for complete system takeover or service disruption).
## Remediation
### Patches
- Users are advised to update SonicWall GMS to versions later than **9.5.1** immediately. Refer to the SonicWall PSIRT portal for specific hotfix or version download instructions.
### Workarounds
- **Network Segmentation:** Isolate the GMS interface from the public internet.
- **Access Control:** Restrict GMS access to a dedicated administrative VLAN or via a secure VPN.
- **Principle of Least Privilege:** Ensure the GMS service account operates with the minimum necessary rights to limit the impact of RCE.
## Detection
- **Indicators of Compromise:** Monitor for unusual outbound traffic from the GMS appliance, unexpected file creations in web directories, and unauthorized new user accounts.
- **Detection methods and tools:** Utilize vulnerability scanners to identify outdated GMS versions. Review web server logs for suspicious POST requests or "ZipSlip" directory traversal patterns (e.g., `../../`).
## References
- hxxps://psirt[.]global[.]sonicwall[.]com/vuln-detail/SNWLID-2026-0011
- hxxps://cve[.]mitre[.]org/cgi-bin/cvename[.]cgi?name=CVE-2026-66145
- hxxps://cve[.]mitre[.]org/cgi-bin/cvename[.]cgi?name=CVE-2026-66147
- hxxps://portal[.]cisecurity[.]org/