CVE-2021-20039: sonicwall sma_200_firmware OS Command Injection

Vulnerability summary

CVE-2021-20039 is a high (CVSS 9.0) OS Command Injection vulnerability in sonicwall sma_200_firmware. EPSS estimates a 78.75% chance of exploitation in the next 30 days, higher than 99.5% of scored vulnerabilities. 3 public exploits are recorded.

Timeline

1. 08-12-2021
   PublishedVulnerability first disclosed.
2. 05-09-2025
   Last modifiedVulnerability information updated.

Description

Improper neutralization of special elements in the SMA100 management interface '/cgi-bin/viewcert' POST http method allows a remote authenticated attacker to inject arbitrary commands as a 'nobody' user. This vulnerability affected SMA 200, 210, 400, 410 and 500v appliances.

• CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.