SonicWall SMA100 Appliances OS Command Injection Vulnerability
SonicWall SMA100 appliances contain an OS command injection vulnerability in the management interface that allows a remote authenticated attacker to inject arbitrary commands as a 'nobody' user, which could potentially lead to code execution.
- Vendor
- SonicWall
- Product
- SMA100 Appliances
- CVSS
- 6.5
- EPSS (exploit probability)
- 4.2%
- Status
- kev
- CISA patch-by (BOD 22-01)
- Added to KEV
Is CVE-2021-20035 being exploited?
Yes. CISA added CVE-2021-20035 to its Known Exploited Vulnerabilities catalog on . CISA only lists a CVE when it has reliable evidence of exploitation in the wild.
FIRST's EPSS model puts the probability of exploitation activity in the next 30 days at 4.2% (scored October 14, 2026).
- CISA KEV[ LISTED ]
- ENISA EUVD (exploited)[ — ]
- CIRCL KEV[ — ]
Catalog snapshot 2026-10-21. Full cross-catalog view: /kev-comparison
What to do
CISA required actionApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
US federal civilian agencies must remediate by (21 days after listing) under BOD 22-01. Everyone else: that deadline is a sensible upper bound, not a target. Vendor guidance and the NVD record are linked under Source above.
Other SonicWall SMA100 Appliances CVEs we track
| CVE / Vulnerability | Severity | CVSS | EPSS | Added to KEV |
|---|---|---|---|---|
| CVE-2023-44221 SonicWall SMA100 Appliances OS Command Injection Vulnerability | [ HIGH ] | 7.2 | 76.3% | |
| CVE-2019-7483 SonicWall SMA100 Directory Traversal Vulnerability | [ HIGH ] | 7.5 | 4.0% | |
| CVE-2021-20038 SonicWall SMA 100 Appliances Stack-Based Buffer Overflow Vulnerabilityransomware use | [ CRITICAL ] | 9.8 | 99.9% | |
| CVE-2021-20016 SonicWall SSLVPN SMA100 SQL Injection Vulnerabilityransomware use | [ CRITICAL ] | 9.8 | 40.0% | |
| CVE-2019-7481 SonicWall SMA100 SQL Injection Vulnerabilityransomware use | [ HIGH ] | 7.5 | 99.9% |