Vulnerability Monitor

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CVE-2021-20039


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.


Security Impact Summary

This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 8.8, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction requiring only low-level privileges . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 10 products from sonicwall, from sonicwall, from sonicwall and 7 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2021, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.


Published

2021-12-08T10:15:07.903

Last Modified

2025-09-05T18:15:35.313

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 8.8 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:S/C:C/I:C/A:C

  • Access Vector: NETWORK
  • Access Complexity: LOW
  • Authentication: SINGLE
  • Confidentiality Impact: COMPLETE
  • Integrity Impact: COMPLETE
  • Availability Impact: COMPLETE
Exploitability Score

8.0

Impact Score

10.0

Weaknesses
  • Type: Secondary
    CWE-78
  • Type: Primary
    CWE-78

Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System sonicwall sma_200_firmware 9.0.0.11-31sv Yes
Operating System sonicwall sma_200_firmware 10.2.0.8-37sv Yes
Operating System sonicwall sma_200_firmware 10.2.1.1-19sv Yes
Hardware sonicwall sma_200 - No
Operating System sonicwall sma_210_firmware 9.0.0.11-31sv Yes
Operating System sonicwall sma_210_firmware 10.2.0.8-37sv Yes
Operating System sonicwall sma_210_firmware 10.2.1.1-19sv Yes
Hardware sonicwall sma_210 - No
Operating System sonicwall sma_410_firmware 9.0.0.11-31sv Yes
Operating System sonicwall sma_410_firmware 10.2.0.8-37sv Yes
Operating System sonicwall sma_410_firmware 10.2.1.1-19sv Yes
Hardware sonicwall sma_410 - No
Operating System sonicwall sma_400_firmware 9.0.0.11-31sv Yes
Operating System sonicwall sma_400_firmware 10.2.0.8-37sv Yes
Operating System sonicwall sma_400_firmware 10.2.1.1-19sv Yes
Hardware sonicwall sma_400 - No
Operating System sonicwall sma_500v_firmware 9.0.0.11-31sv Yes
Operating System sonicwall sma_500v_firmware 10.2.0.8-37sv Yes
Operating System sonicwall sma_500v_firmware 10.2.1.1-19sv Yes
Hardware sonicwall sma_500v - No

References

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For sonicwall's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.