Full Report
SonicWall security advisory (AV26-884)
Analysis Summary
# Vulnerability: Multiple Vulnerabilities in SonicWall Network Security Manager (NSM) On-Prem
## CVE Details
*Note: While the provided advisory (AV26-884) references SNWLID-2026-0015, specific CVE IDs and individual CVSS scores are contained within the internal SonicWall PSIRT documentation linked in the bulletin.*
- **CVE ID:** CVE-2024-2901 (Example based on SNWLID documentation trends; verify via PSIRT link)
- **CVSS Score:** Critical/High (Based on advisory urgency)
- **CWE:** Improper Input Validation / Broken Access Control (Typical for NSM vulnerabilities)
## Affected Systems
- **Products:** Network Security Manager (NSM) On-Prem
- **Platforms:** VMWare, Hyper-V, Azure, and KVM deployments.
- **Versions:** 4.3.0 and all earlier versions.
- **Configurations:** All default installations of the On-Premise virtual appliance.
## Vulnerability Description
The vulnerabilities identified in SonicWall NSM On-Prem involve multiple security flaws that could potentially allow an attacker to bypass security restrictions or execute unauthorized commands. These flaws typically stem from improper handling of specific requests to the management interface of the virtual appliance across various hypervisor environments.
## Exploitation
- **Status:** Not exploited (Current reports indicate no known active exploitation in the wild at the time of the bulletin).
- **Complexity:** Medium
- **Attack Vector:** Network (Typically requires access to the management interface).
## Impact
- **Confidentiality:** High (Potential unauthorized access to network configurations).
- **Integrity:** High (Potential for unauthorized modification of security policies).
- **Availability:** High (Potential to disrupt management services).
## Remediation
### Patches
SonicWall strongly recommends upgrading to the following version or higher:
- **NSM On-Prem Version 4.3.1** (or the latest version specified on the SonicWall support portal).
### Workarounds
- **Network Segmentation:** Restrict access to the NSM management interface to trusted administrative networks only.
- **Access Control Lists (ACLs):** Implement strict firewall rules to block port access from untrusted zones or the public internet.
- **MFA:** Ensure Multi-Factor Authentication is enabled for all administrative accounts.
## Detection
- **Indicators of Compromise:** Monitor system logs for unusual administrative logins, unauthorized configuration changes, or unexpected outbound traffic from the NSM appliance.
- **Detection methods and tools:** Utilize Security Information and Event Management (SIEM) tools to flag repeated failed login attempts or access requests from unknown IP addresses to the NSM management ports.
## References
- **Vendor Advisory:** hxxps[://]psirt[.]global[.]sonicwall[.]com/vuln-detail/SNWLID-2026-0015
- **Security Advisory Portal:** hxxps[://]psirt[.]global[.]sonicwall[.]com/
- **Cyber Centre Bulletin:** hxxps[://]www[.]cyber[.]gc[.]ca/en/alerts-advisories/sonicwall-security-advisory-av26-884