CVE-2026-83549
Published 2026-09-01 · Updated 2026-09-21 · Source PSIRT@sonicwall.com
Summary
CVE-2026-83549 is a high-severity (CVSS 7.8) vulnerability in SonicWall SMA1000 Appliances. CISA added it to the Known Exploited Vulnerabilities catalog on September 2, 2026, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by September 5, 2026. CISA does not currently list it as used in ransomware campaigns. SonicWall has 19 vulnerabilities in the KEV catalog, 13 of them linked to ransomware.
All 19 known-exploited SonicWall vulnerabilities →Description
Post-authentication Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability has been identified in the SMA1000 Appliance Management Console (AMC) which in specific conditions could potentially enable a remote authenticated attacker as administrator to execute arbitrary OS commands, resulting in remote code execution.
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CISA Known-Exploited Vulnerability
Product: SonicWall — SMA1000 Appliances
Name: SonicWall SMA1000 Appliances OS Command Injection Vulnerability
Date added: 2026-09-02 · Due: 2026-09-05
Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.