Is CVE-2021-20016 actively exploited?

CVE-2021-20016 has no public evidence of in-the-wild exploitation as of 2025-10-31.

What is the CVSS score for CVE-2021-20016?

CVE-2021-20016 has a CVSS score of 9.8 (CRITICAL severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

How do I patch CVE-2021-20016?

Patch guidance is available from sonicwall security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2021-20016.

Fix CVE-2021-20016 - CRITICAL sonicwall sma 100 firmware

Q: Which products are affected by CVE-2021-20016?

6 products: sonicwall sma 100 firmware, sonicwall sma 200 firmware, sonicwall sma 210 firmware, sonicwall sma 400 firmware, sonicwall sma 410 firmware, and 1 more.

Description

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.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high
Weaknesses: CWE-89 · SQL Injection CWE-89 · SQL Injection

Metadata

Primary Vendor: SONICWALL
Published: 2/4/2021
Last Modified: 10/31/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

sonicwall : sma_100_firmwaresonicwall : sma_200_firmwaresonicwall : sma_210_firmwaresonicwall : sma_400_firmwaresonicwall : sma_410_firmwaresonicwall : sma_500v

Remediation Guidance

Executive Summary

View on NIST NVD