CVE-2026-83549: SonicWall SMA1000 AMC OS Command Injection

Automated analysis

Generated by VULONE's analysis model from the NVD record, CISA KEV and EPSS data on 17 September 2026. Confidence: medium.

critical priorityThe flaw allows OS command execution on an edge security appliance and is listed in CISA KEV with a three-day federal remediation deadline, indicating active exploitation.

What it is

The SMA1000 Appliance Management Console contains an OS command injection flaw (CWE-78) that lets an authenticated administrator execute arbitrary operating system commands under specific conditions. Because the affected appliance is a remote-access gateway, successful exploitation yields code execution on a security-critical edge device. The record does not state which firmware builds are fixed or affected beyond the listed product names.

Impact

An attacker with administrator access to the AMC gains arbitrary OS command execution on the appliance, leading to full compromise of the device and any credentials or sessions it brokers. The CVSS impact ratings for confidentiality, integrity and availability are all High.

Attack surface

The CVSS vector is AV:L/PR:L/UI:N, indicating local access with low privileges and no user interaction, though the description frames the actor as a remote authenticated administrator reaching the AMC. Either way, valid credentials are required; no unauthenticated path is described.

Exploitation

CVE-2026-83549 was added to CISA KEV on 2026-09-02 with a remediation due date of 2026-09-05, which indicates known exploitation in the wild. EPSS is 0.08505 (94.75th percentile), and no ransomware campaign use is documented.

What to do

• Apply the SonicWall vendor fix per PSIRT advisory SNWLID-2026-0016 as the first action, following CISA BOD 26-04 guidance.
• If no patch is available for a given model, discontinue use of the product or isolate the AMC from untrusted networks as CISA directs.
• Restrict and audit administrator accounts on SMA1000 appliances; remove unused admin accounts and enforce least privilege.
• Limit management interface exposure to trusted networks or a hardened jump host rather than the public internet.
• Monitor vendor and CISA guidance for updated remediation deadlines given the 2026-09-05 KEV due date.

Detection

• Hunt appliance and AMC logs for unexpected child processes or shell invocations spawned by the management console.
• Alert on anomalous administrator logins to the AMC, especially from new source IPs or outside normal maintenance windows.
• Review outbound connections and file changes on SMA1000 appliances for signs of post-exploitation activity.
• Correlate AMC admin activity with OS-level command execution telemetry where available.

This assessment is produced automatically and is not human-reviewed. Verify against the vendor advisory before acting on it.