CVE-2026-83549
SonicWall SMA1000 Appliances OS Command Injection Vulnerability
SonicWall SMA1000 Appliances
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.
Exploitation status
CISA Known Exploited Vulnerabilities
Listed by CISA on 2 September 2026. US federal agencies were required to remediate it by 5 September 2026.
EPSS — exploitation probability
FIRST puts the probability of exploitation activity in the next 30 days at 1.6%, which is higher than 74.6% of all scored vulnerabilities. EPSS is a forecast of activity, not a measure of severity, and it is rescored daily.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Frequently asked questions
Is CVE-2026-83549 being exploited by ransomware groups?
No ransomware group in this database is currently recorded as exploiting CVE-2026-83549.
What does CVE-2026-83549 affect?
CVE-2026-83549 affects SonicWall SMA1000 Appliances. 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.
How severe is CVE-2026-83549?
CVE-2026-83549 is rated HIGH with a CVSS base score of 7.8. EPSS puts the probability of exploitation in the next 30 days at 1.6%, higher than 74.6% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 5 September 2026.
How should organisations respond to CVE-2026-83549?
Apply the vendor patch for SonicWall SMA1000 Appliances as the first priority, and treat any internet-facing instance as the most urgent. Because this vulnerability is associated with ransomware activity, also review whether the affected systems were reachable before patching, rather than assuming that patching alone closes the incident.