SMA 100 Series: Unrestricted Upload of File with Dangerous Type
CVE-2025-40599 is a critical-severity unrestricted upload of file with dangerous type vulnerability in SMA 100 Series from SonicWall, with a CVSS 3.1 base score of 9.1 out of 10. It can be exploited remotely over the network by an attacker with administrator privileges, without any action from a user. Affected SMA 100 Series versions: 10.2.1.15-81sv and earlier versions. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 9.7% chance of exploitation within 30 days, which is in the top 4.42% of all scored CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Update Sma 210 Firmware to 10.2.2.1-90sv or a later version.
- Update Sma 410 Firmware to 10.2.2.1-90sv or a later version.
- Update Sma 500v Firmware to 10.2.2.1-90sv or a later version.
- Read the advisory on psirt.global.sonicwall.com for workarounds and exact fixed builds.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| SonicWall | SMA 100 Series | 10.2.1.15-81sv and earlier versions | Not stated |
| SonicWall | Sma 210 Firmware | before 10.2.2.1-90sv | 10.2.2.1-90sv |
| SonicWall | Sma 410 Firmware | before 10.2.2.1-90sv | 10.2.2.1-90sv |
| SonicWall | Sma 500v Firmware | before 10.2.2.1-90sv | 10.2.2.1-90sv |
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
- HighAdministrator-level access is required first.
- 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:H/UI:N/S:C/C:H/I:H/A:H. Scored by CISA (ADP).
Official description
An authenticated arbitrary file upload vulnerability exists in the SMA 100 series web management interface. A remote attacker with administrative privileges can exploit this flaw to upload arbitrary files to the system, potentially leading to remote code execution.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Unrestricted Upload of File with Dangerous Type
The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.
How developers prevent this class of flaw
- Generate a new, unique filename for an uploaded file instead of using the user-supplied filename, so that no external input is used at all.
- When the set of acceptable objects, such as filenames or URLs, is limited or known, create a mapping from a set of fixed input values (such as numeric IDs) to the actual filenames or URLs, and reject all other inputs.
- Consider storing the uploaded files outside of the web document root entirely. Then, use other mechanisms to deliver the files dynamically.
More Unrestricted Upload of File with Dangerous Type vulnerabilities (CWE-434)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Other vulnerabilities in SMA 100 Series
- 7.5 High severity
- 7.3 High severity
Recent Unrestricted Upload of File with Dangerous Type vulnerabilities
- 7.2 High severity
- 9.8 Critical severity
- 9.8 Critical severity
- 9.8 Critical severity
- 9.8 Critical severity
- 9.8 Critical severity
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