CVE-2021-20035

MediumCVSS 6.5/10Known exploited (CISA KEV)Last modified Jun 17, 2026

Description

Improper neutralization of special elements in the SMA100 management interface allows a remote authenticated attacker to inject arbitrary commands as a 'nobody' user which potentially leads to DoS.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-78

Affected software

Vendor	Product	Versions
SonicWall	SMA100	9.0.0.10-28sv and earlier; 10.2.0.7-34sv and earlier; 10.2.1.0-17sv and earlier

References

https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0022Vendor Advisory
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0022Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-20035US Government Resource

Timeline

Published: Sep 27, 2021
Last modified: Jun 17, 2026
Added to CISA KEV: Apr 16, 2025
NVD status: Analyzed

Related CVEs from 2021

CVE-2021-200377.8SonicWall Global VPN Client 4.10.5 installer (32-bit and 64-bit) incorrect default file permission vulnerability leads to privilege escalati CVE-2021-200389.8A Stack-based buffer overflow vulnerability in SMA100 Apache httpd server's mod_cgi module environment variables allows a remote unauthentic CVE-2021-200398.8Improper neutralization of special elements in the SMA100 management interface '/cgi-bin/viewcert' POST http method allows a remote authenti CVE-2021-20044.3Vulnerability in the Siebel Core - Server BizLogic Script product of Oracle Siebel CRM (component: Integration - Scripting). Supported versi CVE-2021-200407.5A relative path traversal vulnerability in the SMA100 upload funtion allows a remote unauthenticated attacker to upload crafted web pages or CVE-2021-200417.5An unauthenticated and remote adversary can consume all of the device's CPU due to crafted HTTP requests sent to SMA100 /fileshare/sonicfile CVE-2021-200429.8An unauthenticated remote attacker can use SMA 100 as an unintended proxy or intermediary undetectable proxy to bypass firewall rules. This CVE-2021-200438.8A Heap-based buffer overflow vulnerability in SonicWall SMA100 getBookmarks method allows a remote authenticated attacker to potentially exe CVE-2021-200448.8A post-authentication remote command injection vulnerability in SonicWall SMA100 allows a remote authenticated attacker to execute OS system CVE-2021-200459.8A buffer overflow vulnerability in SMA100 sonicfiles RAC_COPY_TO (RacNumber 36) method allows a remote unauthenticated attacker to potential CVE-2021-200468.8A Stack-based buffer overflow in the SonicOS HTTP Content-Length response header allows a remote authenticated attacker to cause Denial of S CVE-2021-200477.8SonicWall Global VPN client version 4.10.6 (32-bit and 64-bit) and earlier have a DLL Search Order Hijacking vulnerability. Successful explo