What’s Vulnerable › Vulnerabilities

CVE-2021-20039

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 78.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-12-08 · updated 2026-06-17
• Weakness: CWE-78

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.

Affected products

• SonicWall Sma 200 Firmware: 9.0.0.11-31sv, 10.2.0.8-37sv, 10.2.1.1-19sv
• SonicWall Sma 210 Firmware: 9.0.0.11-31sv, 10.2.0.8-37sv, 10.2.1.1-19sv
• SonicWall Sma 400 Firmware: 9.0.0.11-31sv, 10.2.0.8-37sv, 10.2.1.1-19sv
• SonicWall Sma 410 Firmware: 9.0.0.11-31sv, 10.2.0.8-37sv, 10.2.1.1-19sv
• SonicWall Sma 500V Firmware: 9.0.0.11-31sv, 10.2.0.8-37sv, 10.2.1.1-19sv

References

• http://packetstormsecurity.com/files/165563/SonicWall-SMA-100-Series-Authenticated-Command-Injection.html
• https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0026
• http://packetstormsecurity.com/files/165563/SonicWall-SMA-100-Series-Authenticated-Command-Injection.html
• https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0026
• https://attackerkb.com/topics/9szJhq46lw/cve-2021-20039/rapid7-analysis

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