What’s Vulnerable › Vulnerabilities

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

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2021-11-03
• EPSS: 40.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-02-04 · updated 2026-08-12
• Weakness: CWE-89

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.

Affected products

• SonicWall SMA 100: from 10.0.0.0 before 10.2.0.5-d-29sv — fixed in 10.2.0.5-d-29sv
• SonicWall Sma 200 Firmware: all versions
• SonicWall Sma 210 Firmware: all versions
• SonicWall Sma 400 Firmware: all versions
• SonicWall Sma 410 Firmware: all versions
• SonicWall Sma 500V: all versions

How to fix

Upgrade to a fixed version: SonicWall SMA 100 10.2.0.5-d-29sv. Check the vendor advisory for mitigations.

References

• https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0001
• https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0001
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-20016

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