CVE-2026-102256 SonicWall CVE debrief

Who should care

Defenders responsible for SonicWall SMA1000 appliances, especially those with versions 12.4.3-03526 (platform-hotfix) and older or 12.5.0-02952 (platform-hotfix) and older, should assess exposure and prioritize patching.

Why it matters

CVE-2026-102256 is a post-authentication OS Command Injection vulnerability in the SMA1000 appliance that could allow remote code execution. Defenders should prioritize verifying and patching affected versions, restricting administrative access, and monitoring for suspicious activity.

• Remote code execution could lead to unauthorized access and control of the SMA1000 appliance.
• Successful exploitation requires administrative authentication, but could result in significant compromise of the appliance and potentially, the network it is connected to.
• Defenders should verify and patch affected versions to prevent potential exploitation.
• Inventory checks and monitoring for suspicious activity are recommended to detect potential exploitation attempts.

Technical summary

The SMA1000 appliance is vulnerable to a post-authentication OS Command Injection attack. An authenticated administrator could potentially execute arbitrary OS commands, leading to remote code execution. The vulnerability exists in specific conditions and defenders should assess exposure and prioritize patching, especially for versions 12.4.3-03526 (platform-hotfix) and older or 12.5.0-02952 (platform-hotfix) and older. Defenders should verify and patch affected versions to prevent potential exploitation and monitor for suspicious activity.

Defensive priority

Defenders should prioritize verifying and patching SMA1000 appliances, especially those with versions 12.4.3-03526 (platform-hotfix) and older or 12.5.0-02952 (platform-hotfix) and older.

Recommended defensive actions

• Verify SMA1000 appliance versions and apply patches for versions 12.4.3-03526 (platform-hotfix) and older or 12.5.0-02952 (platform-hotfix) and older.
• Restrict administrative access to SMA1000 appliances.
• Monitor SMA1000 appliances for suspicious activity.
• Perform inventory checks to identify exposed SMA1000 appliances.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.

Evidence notes

The CVE Program record and NVD vulnerability detail provide information on the vulnerability. The SonicWall PSIRT advisory (SNWLID-2026-0017) offers additional context. Evidence is limited to public sources and defenders should verify and patch affected versions to prevent potential exploitation. Inventory checks and monitoring for suspicious activity are recommended to detect potential exploitation attempts.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.