SonicWall SMA1000 Appliances
CVE-2026-83548
SonicWall SMA1000 Appliances contains a server-side request forgery vulnerability that could allow a remote unauthenticated attacker to gain unauthorized access to sensitive functionality and perform unauthorized operations.
What this means for your business
- It affects SonicWall SMA1000 Appliances. It matters if your company, or a supplier that handles your data, runs it.
- Attackers are already using it. CISA added it to its list of flaws used in real attacks on 2 September 2026.
- An attacker can use it remotely, over a network, without a login, and without anyone at your company clicking anything.
- FIRST's prediction model gives it a 5% chance of attack attempts being seen in the next 30 days, ranking above 91% of all known flaws.
What to do
- 1Check whether your company or your suppliers run SonicWall SMA1000 Appliances, and which version. The affected versions are listed further down this page.
- 2If you do, apply the vendor's fix. A patch or vendor advisory has been published.
- 3Treat it as urgent. US federal agencies must fix it by 5 September 2026. That deadline does not apply to private companies, but it shows how seriously CISA takes it.
- 4Because attackers have used it, check the affected systems for signs of a break-in, not only for the update.
Not sure if your company is exposed?
Fastnexa’s certified penetration testers can check whether attackers could use this flaw, or others like it, against your websites, apps and network. The full test is free for our first 10 founding clients until 31 December 2026.
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’s wording, unedited. The notes it mentions are in CISA’s catalogue entry.
Scoring
- CVSS
- 10.0 (v3.1)
- Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H- Weakness
- CWE-441
- Assigned by
- PSIRT@sonicwall.com
Dates
- Published
- 2026-09-02
- Last modified
- 2026-09-03
- Added to KEV
- 2026-09-02
- Remediation due
- 2026-09-05
- Sources
- CISA KEV, NVD
Affected products
- Sonicwall Sma8200v- 12.4.3-03526, 12.5.0 - 12.5.0-02952, all versions
- Sonicwall Sma6210 Firmware- 12.4.3-03526, 12.5.0 - 12.5.0-02952
- Sonicwall Sma6210all versions
- Sonicwall Sma7210 Firmware- 12.4.3-03526, 12.5.0 - 12.5.0-02952
- Sonicwall Sma7210all versions
As listed in the NVD configuration data. Not a statement about your estate.
Coverage
- CISA Adds Seven Exploited Flaws as Attackers Deploy Reverse Shells and Crypto MinersThe Hacker News · 2026-09-03
- SonicWall security advisory (AV26-872) – Update 1Canadian Centre for Cyber Security · 2026-09-02
- Critical SonicWall SMA1000 Vulnerabilities CVE-2026-83548, CVE-2026-83549 Exploited in the WildRapid7 Blog · 2026-09-02