---
id: CVE-2021-20016
title: >-
  A SQL-Injection vulnerability in the SonicWall SSLVPN SMA100 product allows a
  remote unauthenticated attacker to perform SQL query to access username
  password and other session related information
summary: >-
  A SQL-Injection vulnerability in the SonicWall SSLVPN SMA100 product allows a
  remote unauthenticated attacker to perform SQL query to access username
  password and other session related information. This vulnerability impacts
  SMA100 build…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-89
  - CWE-89
vendor: sonicwall
product: sma_500v
affected:
  - 'sma_100_firmware >= 10.0.0.0, < 10.2.0.5-d-29sv'
  - sma_200_firmware
  - sma_210_firmware
  - sma_400_firmware
  - sma_410_firmware
  - sma_500v
patched:
  - sma_100_firmware 10.2.0.5-d-29sv
published: '2021-02-04'
updated: '2026-08-12'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2021-20016'
references:
  - url: 'https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0001'
    label: PSIRT@sonicwall.com
  - url: 'https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0001'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-20016
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - kev
  - in-the-wild
epss: 0.40038
epssPercentile: 0.98585
kev: true
kevDateAdded: '2021-11-03'
kevDueDate: '2021-11-17'
kevRansomware: true
exploited: true
zeroDay: true
ingestedAt: '2026-08-12T19:54:25.512Z'
---

## Overview

A SQL-Injection vulnerability in the SonicWall SSLVPN SMA100 product allows a remote unauthenticated attacker to perform SQL query to access username password and other session related information. This vulnerability impacts SMA100 build version 10.x.

## Affected

- `sma_100_firmware >= 10.0.0.0, < 10.2.0.5-d-29sv`
- `sma_200_firmware`
- `sma_210_firmware`
- `sma_400_firmware`
- `sma_410_firmware`
- `sma_500v`

## Remediation

Upgrade past the affected range:

- `sma_100_firmware 10.2.0.5-d-29sv`