# CVE-2026-20350: Cisco ThousandEyes Virtual Appliance Authenticated Web Interface Command Injection Vulnerability

> Authenticated attackers can inject OS commands via the web interface to execute arbitrary code with root privileges.

- **Severity:** Medium 4.7 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 16 Sep 2026
- **Updated:** 21 Sep 2026
- **Also known as:** GHSA-gvrw-xc72-49qh

## What is CVE-2026-20350?

CVE-2026-20350 is a medium-severity command injection vulnerability in Cisco ThousandEyes Enterprise Agent, published on 16 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

A vulnerability in the web-based management interface of Cisco ThousandEyes Virtual Appliance could allow an authenticated, remote attacker to inject arbitrary operating system commands.

This vulnerability is due to improper validation of user-supplied input to the web-based management interface. An attacker could exploit this vulnerability by saving configuration details that contain malicious values. A successful exploit could allow the attacker to execute arbitrary operating system commands with root privileges. To exploit this vulnerability, the attacker must have valid administrative credentials.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command)

## Which versions are affected by CVE-2026-20350?


## How do I fix CVE-2026-20350?

No fix has been published for CVE-2026-20350 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-20350 being exploited?

There is no known exploitation of CVE-2026-20350 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-20350 and fix it if it is affected.

What it is: CVE-2026-20350 is a medium-severity command injection vulnerability in Cisco ThousandEyes Enterprise Agent, published on 16 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-20350 in the wild and no public exploit code.

Affected product: Cisco ThousandEyes Enterprise Agent. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-20350/ (Markdown: https://insights.sbomify.com/CVE-2026-20350/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-20350
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-20350
- OSV: https://osv.dev/vulnerability/CVE-2026-20350

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-20350/
Summaries are generated and may contain mistakes; the official description above is the record.