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Known exploited vulnerability

CVE-2026-83549

highCVSS 3.1 7.8In CISA KEVEPSS 9.9%Published · SonicWall

The short answer

CVE-2026-83549 affects SonicWall SMA1000 and is rated high (CVSS 7.8). CISA added it to the Known Exploited Vulnerabilities catalog on 2026-09-02: attackers are using it, so patch it first.

What it is

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.

Weakness: CWE-78.

Severity

7.8 high

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploited (CISA KEV)

Yes, since Sep 2, 2026

Federal due date Sep 5, 2026

EPSS, next 30 days

9.9%

Higher than 96% of scored CVEs

How it can be exploited

Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

What CISA says to do

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…

Affected products

SMA1000. NVD's record lists the exact affected versions.

References

Questions

Is CVE-2026-83549 being exploited?

Yes. CISA added CVE-2026-83549 to its Known Exploited Vulnerabilities catalog on 2026-09-02, with a federal remediation due date of 2026-09-05.

How do I fix CVE-2026-83549?

CISA's 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…

From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.

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