SQL injection in SonicWall SMA100

Published: 2021-01-24 | Updated: 2021-02-05
Risk Critical
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2021-20016
Exploitation vector Network
Public exploit This vulnerability is being exploited in the wild.
Vulnerable software
SMA 100
Hardware solutions / Security hardware applicances

NetExtender for Linux
Client/Desktop applications / Other client software

NetExtender for Windows
Client/Desktop applications / Other client software

Vendor SonicWall

Security Advisory

Updated: 26.01.2021

Improved list of affected software.

Updated: 04.02.2021

The vendor has issued a security patch, changed bulletin status to patched, assigned CVE-ID.

Updated: 05.02.2021

Changed bulletin name and updated vulnerability description.

1) SQL injection

Risk: Critical

CVSSv3.1: 9.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C] [PCI]

CVE-ID: CVE-2021-20016

CWE-ID: CWE-89 - Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')

Exploit availability: No


The vulnerability allows a remote attacker to execute arbitrary SQL queries in database.

The vulnerability exists due to insufficient sanitization of user-supplied data. A remote non-authenticated attacker can send a specially crafted HTTP request to the SSL-VPN appliance and execute arbitrary SQL commands within the application database.

Successful exploitation of this vulnerability may allow a remote attacker to access usernames, passwords and other session related information.

Note, the vulnerability is being actively exploited in the wild.


Vulnerable software versions

SMA 100:,

NetExtender for Linux: 10.2.816, 10.2.817

NetExtender for Windows:, 10.2.302

CPE External links


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.