SonicWall SMA1000 appliance
CVE-2025-40602
SonicWall SMA1000 contains a missing authorization vulnerability that could allow for privilege escalation appliance management console (AMC) of affected devices.
What this means for your business
- It affects SonicWall SMA1000 appliance. 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 17 December 2025.
- FIRST's prediction model gives it a 3% chance of attack attempts being seen in the next 30 days, ranking above 86% of all known flaws.
What to do
- 1Check whether your company or your suppliers run SonicWall SMA1000 appliance.
- 2If you do, follow CISA's required action below. No patch reference has been published yet.
- 3Treat it as urgent. US federal agencies must fix it by 24 December 2025. 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.
Fastnexa security experts
Attackers are already using this flaw. Is your SonicWall SMA1000 appliance exposed?
Tell us where you run SonicWall SMA1000 appliance and a Fastnexa penetration tester will check whether this flaw, or others like it, can be used against your websites, apps and network.
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Required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable
CISA’s wording, unedited.
Scoring
- CVSS
- Not yet scored
Dates
- Published
- 2025-12-17
- Added to KEV
- 2025-12-17
- Remediation due
- 2025-12-24
- Sources
- CISA KEV