CVE DATABASE / CVE-2021-20035
CVE-2021-20035
SonicWall SMA100 Appliances OS Command Injection Vulnerability
Confirmed exploited in the wild. Added 2025-04-16.
Federal remediation due 2025-05-07.
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.
Summary
Improper neutralization of special elements in the SMA100 management interface allows a remote authenticated attacker to inject arbitrary commands as a 'nobody' user which potentially leads to DoS.
CVSS 3.1 breakdown
| Base score | 6.5 (MEDIUM) |
| Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| Attack vector | NETWORK |
| Attack complexity | LOW |
| Privileges required | LOW |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity | NONE |
| Availability | HIGH |
Weakness type (CWE)
Affected products
Use our free CVE Lookup tool for the latest NVD record, or browse the full CISA KEV catalog.
References
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0022
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-20035
Data: NIST NVD + CISA KEV. NVD last modified 2025-10-31. Always verify against the vendor advisory before acting.