SonicWall SMA1000 Appliances Server-Side Request Forgery
CVE-2026-83548 is a critical-severity unintended proxy or intermediary vulnerability in SMA1000 from SonicWall, with a CVSS 3.1 base score of 10.0 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected SMA1000 versions: 12.4.3-03453 (platform-hotfix) and older versions; 12.5.0-02835 (platform-hotfix) and older versions. The record does not name a fixed version, so check the vendor advisory. CISA added it to the Known Exploited Vulnerabilities catalogue on September 2, 2026, which means attacks have been observed in the wild.
Attackers are already exploiting this vulnerability, according to CISA.
What to do
- Update Sma8200v to 12.4.3-03526 or 12.5.0-02952, whichever matches your release line, or a later version.
- Update Sma6210 Firmware to 12.4.3-03526 or 12.5.0-02952, whichever matches your release line, or a later version.
- Update Sma7210 Firmware to 12.4.3-03526 or 12.5.0-02952, whichever matches your release line, or a later version.
- 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 evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
- Read the advisory on psirt.global.sonicwall.com for workarounds and exact fixed builds.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| SonicWall | SMA1000 | 12.4.3-03453 (platform-hotfix) and older versions; 12.5.0-02835 (platform-hotfix) and older versions | Not stated |
| SonicWall | Sma8200v | before 12.4.3-03526; 12.5.0 up to, but not including, 12.5.0-02952 | 12.4.3-03526, 12.5.0-02952 |
| SonicWall | Sma6210 Firmware | before 12.4.3-03526; 12.5.0 up to, but not including, 12.5.0-02952 | 12.4.3-03526, 12.5.0-02952 |
| SonicWall | Sma7210 Firmware | before 12.4.3-03526; 12.5.0 up to, but not including, 12.5.0-02952 | 12.4.3-03526, 12.5.0-02952 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- ChangedThe attack can reach beyond the vulnerable component into other systems.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H. Scored by CISA (ADP).
Official description
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.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Unintended Proxy or Intermediary
The product receives a request, message, or directive from an upstream component, but the product does not sufficiently preserve the original source of the request before forwarding the request to an external actor that is outside of the product's control sphere.
How developers prevent this class of flaw
- Enforce the use of strong mutual authentication mechanism between the two parties.
- Whenever a product is an intermediary or proxy for transactions between two other components, the proxy core should not drop the identity of the initiator of the transaction. The immutability of the identity of the initiator must be maintained and should be forwarded all the way to the target.
More Unintended Proxy or Intermediary vulnerabilities (CWE-441)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: active, automatable: yes, technical impact: total).
- Added to CISA's Known Exploited Vulnerabilities catalogue.
- Record last changed materially (score, affected products, status or references).
- Deadline for US federal agencies to remediate, set by CISA.
References
Third-party and government advisories
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-83548US Government Resource
Our coverage
Other vulnerabilities in SMA1000
- 7.2 High severity
- 7.8 High severity
- 10.0 Critical severity
- 7.8 High severity
- 7.2 High severity
- 10.0 Critical severity
Recent Unintended Proxy or Intermediary vulnerabilities
- 8.2 High severity
- 9.9 Critical severity
- 7.1 High severity
- 9.9 Critical severity
- 9.6 Critical severity
- 9.1 Critical severity
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