---
title: "CVE-2026-83549: SonicWall SMA1000 Appliances OS Command Injection Vulnerability"
url: https://erroneo.us/security/cve/CVE-2026-83549/
description: "CVE-2026-83549 (SonicWall SMA1000 Appliances): Exploited in the wild (CISA KEV). Post-authentication Improper Neutralization of Special Elements used in an…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-09-01
date_modified: 2026-09-21
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-83549"
kev: true
cvss: 7.8
epss: 0.09889
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-83549: SonicWall SMA1000 Appliances OS Command Injection Vulnerability

**Signal:** Exploited: patch now if you run it. CISA has confirmed exploitation in the wild. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Yes, if you run SonicWall SMA1000 Appliances. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2026-09-02, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2026-09-05 ; treat that as the outer limit, not the target.
- EPSS 9.9% , percentile 96: FIRST’s model estimates a 9.9% chance of exploitation activity in the next 30 days, higher than 96% of all scored CVEs (very high). EPSS is a probability, not a verdict.
- Needs local access needed. Lower urgency for most teams unless an attacker could already run code on the machine.
- Editorial verdict: Act now. SonicWall SMA1000: Two Rounds of Exploited Zero-Days — If you run an SMA1000 appliance, install the September hotfix and check it for compromise today; the July fix alone does not cover the second pair of exploited bugs.

## 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.

## Affected products (CVE record)

- SonicWall SMA1000: 12.4.3-03453 (platform-hotfix) and older versions, 12.5.0-02835 (platform-hotfix) and older versions

## Severity

- CISA-ADP CVSS 3.1: 7.8 `CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`

## Exploitation

- CISA KEV: added 2026-09-02; federal due date 2026-09-05. Known ransomware use: Unknown.
- CISA 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.
- CISA SSVC assessment: exploitation active , automatable no , technical impact total .
- FIRST EPSS (model of 2026-10-21): 9.89% probability of exploitation activity in the next 30 days; percentile 96.

## Sources

- [psirt.global.sonicwall.com](https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2026-0016)
- [CVE.org record CVE-2026-83549](https://www.cve.org/CVERecord?id=CVE-2026-83549)
- [NVD entry CVE-2026-83549](https://nvd.nist.gov/vuln/detail/CVE-2026-83549)
- [CISA Known Exploited Vulnerabilities catalog entry](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-83549)
- [Listed in CISA KEV notes (cisa.gov)](https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk)
- [Listed in CISA KEV notes (cisa.gov)](https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk)

---
Source page: https://erroneo.us/security/cve/CVE-2026-83549/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt