SMA1000: Observable Response Discrepancy
CVE-2026-4113 is a high-severity observable response discrepancy vulnerability in SMA1000 from SonicWall, with a CVSS 3.1 base score of 7.2 out of 10. It can be exploited remotely over the network by an attacker with administrator privileges, without any action from a user. Affected SMA1000 versions: 12.4.3-03245 (platform-hotfix) and earlier versions.; 12.5.0-02283 (platform-hotfix) 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 0.37% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Sma6210 Firmware to 12.4.3-03387 or 12.5.0-02624, whichever matches your release line, or a later version.
- Update Sma8200v to 12.4.3-03387 or 12.5.0-02624, whichever matches your release line, or a later version.
- Update Sma7200 Firmware to 12.4.3-03387 or 12.5.0-02624, whichever matches your release line, 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 | SMA1000 | 12.4.3-03245 (platform-hotfix) and earlier versions.; 12.5.0-02283 (platform-hotfix) and earlier versions. | Not stated |
| SonicWall | Sma6210 Firmware | before 12.4.3-03387; 12.5.0 up to, but not including, 12.5.0-02624 | 12.4.3-03387, 12.5.0-02624 |
| SonicWall | Sma8200v | before 12.4.3-03387; 12.5.0 up to, but not including, 12.5.0-02624 | 12.4.3-03387, 12.5.0-02624 |
| SonicWall | Sma7200 Firmware | before 12.4.3-03387; 12.5.0 up to, but not including, 12.5.0-02624 | 12.4.3-03387, 12.5.0-02624 |
| SonicWall | Sma7210 Firmware | before 12.4.3-03387; 12.5.0 up to, but not including, 12.5.0-02624 | 12.4.3-03387, 12.5.0-02624 |
| SonicWall | Sma6200 Firmware | before 12.4.3-03387; 12.5.0 up to, but not including, 12.5.0-02624 | 12.4.3-03387, 12.5.0-02624 |
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
- UnchangedImpact stays within the vulnerable component.
- 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:U/C:H/I:H/A:H. Scored by CISA (ADP).
Official description
An observable response discrepancy vulnerability in the SonicWall SMA1000 series appliances allows a remote attacker to enumerate SSL VPN user credentials.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Observable Response Discrepancy
The product provides different responses to incoming requests in a way that reveals internal state information to an unauthorized actor outside of the intended control sphere.
How developers prevent this class of flaw
- Compartmentalize the system to have safe areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area. Ensure that appropriate compartmentalization is built into the system design, and the compartmentalization allows for and reinforces privilege separation functionality. Architects and designers should rely on the principle of least privilege to decide the appropriate time to use privileges and the time to drop privileges.
More Observable Response Discrepancy vulnerabilities (CWE-204)
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 SMA1000
- 7.2 High severity
- 7.8 High severity
- 10.0 Critical severity
- 7.8 High severity
- 10.0 Critical severity
- 7.2 High severity
Recent Observable Response Discrepancy vulnerabilities
- 7.5 High severity
- 7.5 High severity
- 8.6 High severity
- 7.5 High severity
- 7.5 High severity
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