CVE-2021-20035—SonicWall SMA100 Appliances OS Command Injection Vulnerability

Vulnerability Name

SonicWall SMA100 Appliances OS Command Injection Vulnerability

Description

SonicWall SMA100 appliances contain an OS command injection vulnerability in the management interface that allows a remote authenticated attacker to inject arbitrary commands as a 'nobody' user, which could potentially lead to code execution.

Known To Be Used in Ransomware Campaigns?

Ransomware Status:

Unknown

Action

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Additional Notes

• https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0022
• https://nvd.nist.gov/vuln/detail/CVE-2021-20035

Related News Articles

• SonicWall urges admins to patch critical RCE flaw in SMA 100 devicesJuly 24, 2025
• SonicWall SMA devices persistently infected with stealthy OVERSTEP backdoor and rootkitJuly 16, 2025
• SonicWall SMA devices hacked with OVERSTEP rootkit tied to ransomwareJuly 16, 2025
• UNC6148 Backdoors Fully-Patched SonicWall SMA 100 Series Devices with OVERSTEP RootkitJuly 16, 2025
• SonicWall Patches 3 Flaws in SMA 100 Devices Allowing Attackers to Run Code as RootMay 8, 2025

Related Weaknesses

• CWE-78