---
title: "CVE-2026-83548: SonicWall SMA1000 Appliances Server-Side Request Forgery Vulnerability"
url: https://erroneo.us/security/cve/CVE-2026-83548/
description: "CVE-2026-83548 (SonicWall SMA1000 Appliances): Exploited in the wild (CISA KEV). A Pre-authentication SSRF vulnerability exists in the SMA1000 Appliance…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-09-01
date_modified: 2026-09-03
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-83548"
kev: true
cvss: 10
epss: 0.08043
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-83548: SonicWall SMA1000 Appliances Server-Side Request Forgery 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 8.0% , percentile 95: FIRST’s model estimates a 8.0% chance of exploitation activity in the next 30 days, higher than 95% of all scored CVEs (elevated). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- 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

A Pre-authentication SSRF vulnerability exists in the SMA1000 Appliance Work Place interface due to an unintended alternate access path. A remote unauthenticated attacker could potentially exploit this vulnerability to gain unauthorized access to sensitive functionality and perform unauthorized operations.

## 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: 10 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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 yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 8.04% probability of exploitation activity in the next 30 days; percentile 95.

## Sources

- [psirt.global.sonicwall.com](https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2026-0016)
- [CVE.org record CVE-2026-83548](https://www.cve.org/CVERecord?id=CVE-2026-83548)
- [NVD entry CVE-2026-83548](https://nvd.nist.gov/vuln/detail/CVE-2026-83548)
- [CISA Known Exploited Vulnerabilities catalog entry](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-83548)
- [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-2026-83548/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt