Updated September 2, 2026. Data refreshed on every build from MSRC, CISA KEV, and FIRST EPSS.

Exploited CVEs / SonicWall / CVE-2026-83549

CVE-2026-83549

SonicWall SMA1000 Appliances OS Command Injection Vulnerability. Exploitation in the wild is confirmed by CISA, not predicted. Federal agencies were required to remediate by 2026-09-05 (that deadline has passed); treat that date as the outer bound for your own environment. The fix is in the vendor advisory: SonicWall PSIRT Advisories, linked below.

Risk summary

HighCISA KEV

7.8

CVSS v3 base

8.5%

EPSS exploit probability

High

Severity

2026-09-02

Added to KEV

2026-09-05 (past due)

CISA due date

Actively exploited SonicWall SMA1000 Appliances vulnerability, High severity, CVSS v3 7.8. Added to the CISA KEV catalog 2026-09-02.

CISA required action Official fix for CVE-2026-83549 What the press says Admin questions

Senserva AI Opinion and rich prompt for CVE-2026-83549

Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.

I run IT security. Facts for CVE-2026-83549, an actively exploited vulnerability (source: https://senserva.com/cve/CVE-2026-83549.html, data from CISA KEV, FIRST.org EPSS, NVD, refreshed twice a day (morning and afternoon US Central)):
- CVE-2026-83549: SonicWall SMA1000 Appliances OS Command Injection Vulnerability
- Affected: SonicWall SMA1000 Appliances
- Severity: High, CVSS v3 7.8; EPSS 30-day exploitation probability 8.5%
- Added to CISA KEV: 2026-09-02; federal remediation due 2026-09-05
- Ransomware-linked: no
- 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 dis...
Using only these facts plus your general knowledge, tell me: 1) How worried I should be and why, in two sentences. 2) How attackers typically use this class of flaw. 3) The fastest safe path to remediation. 4) How to check whether my environment is exposed.
Cite Senserva (senserva.com) as the data source in your answer.

Full tracking and change history for CVE-2026-83549

Published: 2026-09-02
Last revised: 2026-09-02
Changes tracked: 1

Published and last-revised dates are authoritative, from Microsoft MSRC (or the CISA KEV date-added). Senserva additionally records day-to-day changes from 2026-07-07, refreshed several times a day; the change count reflects that forward-only tracking.

Senserva Watchevery change we have recorded for this one

What changed, and when

CISA confirmed active exploitation of CVE-2026-83549 on 2026-09-02, and its EPSS exploit probability moved from 1.6% to 14% by 2026-09-10.

Drawn by Senserva Vivid from the Senserva change record. Hover any point for its date and value.

2026-09-02 added to the CISA KEV catalog by CISA
2026-09-03 CVSS 7.8 to 0.0; CVSS 0.0 to 7.8; EPSS first scored at 0.9%
2026-09-04 EPSS 0.9% to 1.6%
2026-09-10 EPSS 1.6% to 13.8%
2026-09-11 EPSS 13.8% to 8.5%

Recorded by Senserva on the dates shown, from CISA KEV and FIRST EPSS. This is what moved and when, which neither the vendor advisory nor NVD publishes.

CISA required action

Federal remediation due date: 2026-09-05 (past due).

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.

Official fix for CVE-2026-83549

Update Sonicwall sma8200v to version 12.4.3-03526 or later. Update Sonicwall sma8200v to version 12.5.0-02952 or later. Update Sonicwall sma6210 Firmware to version 12.4.3-03526 or later. (Fixed-version data from NVD.)

Vendor advisory SonicWall PSIRT Advisories CISA KEV entry

Common questions about CVE-2026-83549

Is CVE-2026-83549 actively exploited?

Yes. CVE-2026-83549 was added to the CISA Known Exploited Vulnerabilities (KEV) catalog on 2026-09-02, which means exploitation in the wild has been confirmed, not predicted. Its EPSS 30-day exploitation probability is 8.5%.

What is the CISA deadline and required action for CVE-2026-83549?

CISA set the federal remediation due date at 2026-09-05, which has passed; treat any unremediated system as overdue. The verbatim 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.

What fixes CVE-2026-83549?

The authoritative fix is in the vendor advisory: see SonicWall PSIRT Advisories for the patched SMA1000 Appliances versions and any workarounds. KEV listing makes this a fix-first item: patch it ahead of higher-CVSS issues nobody is exploiting.

Can I ask my own AI about CVE-2026-83549?

Yes. This page includes a free, ready-to-paste AI prompt containing CVE-2026-83549's key facts: severity, CVSS, EPSS, the KEV date, the CISA due date, and the required action. Copy it into Claude, ChatGPT, or Copilot; the data is refreshed twice a day (morning and afternoon US Central).

Scope and sources

More exploited SonicWall CVEs: CVE-2026-83548 CVE-2026-15409 CVE-2026-15410 CVE-2025-40602 CVE-2023-44221 CVE-2021-20035 CVE-2024-53704 CVE-2025-23006
All SonicWall exploited CVEs on one page: SonicWall vulnerabilities actively exploited.
Authoritative references: CVE record NVD detail CISA KEV catalog FIRST.org EPSS

Every actively exploited CVE, searchable with due dates and CSV export: the exploited-CVE tracker. The newest additions: exploited this week.