---
title: "CVE-2021-20035: SonicWall SMA100 vulnerability | CubePath"
description: "Improper neutralization of special elements in the SMA100 management interface allows a remote authenticated attacker to inject arbitrary commands…"
language: en
source: https://cubepath.com/security/cve/CVE-2021-20035
---

# CVE-2021-20035: SonicWall SMA100 vulnerability | CubePath

## Description

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.

Official description from the CVE record, published by sonicwall. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2021-20035)

## Key data

### CVSS 3.1 Medium 6.5

Score published by CISA-ADP in the CVE record.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

| Metric                 | Value     | What it means                                                                       |
| ---------------------- | --------- | ----------------------------------------------------------------------------------- |
| Attack vector          | Network   | The vulnerable component can be reached over a network, possibly from the Internet. |
| Attack complexity      | Low       | No special conditions are needed. The attack can be repeated at will.               |
| Privileges required    | Low       | A basic user account is needed.                                                     |
| User interaction       | None      | No action from any user is needed.                                                  |
| Scope                  | Unchanged | The impact stays within the vulnerable component.                                   |
| Confidentiality impact | None      | No effect on the secrecy of data.                                                   |
| Integrity impact       | None      | No effect on the trustworthiness of data.                                           |
| Availability impact    | High      | Serious or total effect on availability.                                            |

CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at [first.org/cvss](https://www.first.org/cvss/) .

### EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.

Score

0.04406 (4.4% probability)

Percentile

91.4%

Scores of

Nov 10, 2026

Model

v2026.06.15

### CISA Known Exploited Vulnerabilities

This CVE is listed in the CISA KEV catalog.

Name in the catalog

SonicWall SMA100 Appliances OS Command Injection Vulnerability

Added to the catalog

Apr 16, 2025

Federal due date

May 7, 2025

### CISA assessment as of Apr 17, 2025

Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA.

Exploitation

Recorded by CISA as active

Automatable

no

Technical impact

total

### Weakness (CWE)

CWE catalog version 5.0.

CWE names: Copyright © 2006-2026, The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CWE license.

- [CWE-78](https://cwe.mitre.org/data/definitions/78.html) Improper Neutralization of Special Elements used in an OS Command

## Affected products

Products listed in the CVE record, as the CNA published them.

- SonicWall SMA100

  - affected: 9.0.0.10-28sv and earlier
  - affected: 10.2.0.7-34sv and earlier
  - affected: 10.2.1.0-17sv and earlier

## References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

- [psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0022](https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0022)

## Timeline

1. ID reserved Dec 17, 2020
2. Record published Sep 27, 2021
3. Added to CISA KEV Apr 16, 2025
4. Record last updated Oct 21, 2025

## Look up another CVE

## About CubePath

CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection.

[Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection)

Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:20 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)