Every exploited vulnerability / SonicWall
CVE-2021-20038 in SonicWall SMA 100 Appliances: known exploited
Generated from its entry in CISA's catalogue of known exploited vulnerabilities as of 3 November 2026.
Attackers are exploiting CVE-2021-20038 in SonicWall SMA 100 Appliances. CISA has listed it as known exploited since 28 January 2022.
Ransomware groups have used this vulnerability.
| Product | SonicWall SMA 100 Appliances |
|---|---|
| Known exploited since | 28 January 2022 |
| Ransomware use | Recorded |
| EU vulnerability database | EUVD-2021-7501 |
| Sources | NVD · CISA KEV |
What it means
Attackers have used this vulnerability in real attacks. An unpatched SonicWall SMA 100 Appliances that can be reached from the internet is exposed to them.
What to do
- Apply the vendor's fix to every system running SonicWall SMA 100 Appliances, starting with those reachable from the internet. Take a system off the internet until it can be fixed.
- Check the system for signs that it was reached before the fix.
How Vardion finds it
Wherever a scan or your imported scanner results find CVE-2021-20038, Vardion names the systems affected and puts the fix at the top of the list.