Is CVE-2021-20035 actively exploited?

CVE-2021-20035 has no public evidence of in-the-wild exploitation as of 2025-10-31.

What is the CVSS score for CVE-2021-20035?

CVE-2021-20035 has a CVSS score of 6.5 (MEDIUM severity). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

How do I patch CVE-2021-20035?

Patch guidance is available from sonicwall security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2021-20035.

CVE-2021-20035 - remediation guidance & executive summary

Q: Which products are affected by CVE-2021-20035?

15 products: sonicwall sma 200 firmware, sonicwall sma 200 firmware, sonicwall sma 200 firmware, sonicwall sma 210 firmware, sonicwall sma 210 firmware, and 10 more.

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.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector: network
Complexity: low
Privileges: low
User Action: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: high
Weaknesses: CWE-78 · OS Command Injection CWE-78 · OS Command Injection

Metadata

Primary Vendor: SONICWALL
Published: 9/27/2021
Last Modified: 10/31/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

sonicwall : sma_200_firmwaresonicwall : sma_200_firmwaresonicwall : sma_200_firmwaresonicwall : sma_210_firmwaresonicwall : sma_210_firmwaresonicwall : sma_210_firmwaresonicwall : sma_400_firmwaresonicwall : sma_400_firmwaresonicwall : sma_400_firmwaresonicwall : sma_410_firmwaresonicwall : sma_410_firmwaresonicwall : sma_410_firmwaresonicwall : sma_500vsonicwall : sma_500vsonicwall : sma_500v

Remediation Guidance

Executive Summary

View on NIST NVD