# CVE-2021-20016: SonicWall SSLVPN SMA100 SQL Injection Vulnerability

Source: https://junglewise.ai/threats/cve-2021-20016-sonicwall-sslvpn-sma100-sql-injection-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2021-11-03. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2021-20016 · Severity: critical · CVSS 9.8 · Exploited in the wild · Published 2021-11-03

A SQL injection vulnerability in SonicWall SMA100 series appliances allows a remote, unauthenticated attacker to execute SQL queries. This can be exploited to access sensitive information including usernames, passwords, and session-related data.

Vendors: [SonicWall](https://junglewise.ai/threats/vendors/sonicwall).

## Quick answers

**Is CVE-2021-20016 exploited in the wild?** Yes. CVE-2021-20016 is known to be exploited in the wild, first recorded on 3 November 2021. Treat it as urgent.

**How severe is CVE-2021-20016?** Critical severity, with a CVSS score of 9.8, published 3 November 2021.

**Which products and versions are affected?** SonicWall SMA 100 Firmware 10.x (specifically 10.0.0.0 up to but excluding 10.2.0.5-d-29sv); SonicWall SMA 100; SonicWall SMA 200; SonicWall SMA 210; and 3 more.

**Is there a fix for CVE-2021-20016?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2021-20016 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2021-20016?** Check whether you run SonicWall Sslvpn Sma100. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- SonicWall SMA 100 Firmware 10.x (specifically 10.0.0.0 up to but excluding 10.2.0.5-d-29sv)
- SonicWall SMA 100
- SonicWall SMA 200
- SonicWall SMA 210
- SonicWall SMA 400
- SonicWall SMA 410
- SonicWall SMA 500v

## Timeline

- 2021-02-04: disclosed: NVD Published Date
- 2021-11-03: kev added: Date added to CISA Known Exploited Vulnerabilities Catalog
- 2021-11-17: other: CISA Due Date for remediation