# CVE-2026-20063: Cisco Secure FTD Software Authenticated Command Injection Vulnerability

> An authenticated local attacker with admin credentials can execute arbitrary OS commands as root via crafted CLI input in Cisco Secure FTD.

- **Severity:** Medium 6.0 (`CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N/E:X/RL:X/RC:X`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 4 Mar 2026
- **Updated:** 5 Mar 2026
- **Also known as:** GHSA-x599-6m8q-75qp

## What is CVE-2026-20063?

CVE-2026-20063 is a medium-severity command injection vulnerability in Cisco Secure Firewall Threat Defense (FTD) Software, published on 4 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A vulnerability in the CLI of Cisco Secure FTD Software could allow an authenticated, local attacker to execute arbitrary commands on the underlying operating system as root. To exploit this vulnerability, the attacker must have valid administrative credentials on an affected device.

This vulnerability is due to insufficient input validation of user-supplied command arguments. An attacker could exploit this vulnerability by submitting crafted input for a specific CLI command. A successful exploit could allow the attacker to execute commands on the underlying operating system as root.

Weakness: CWE-88 (Improper Neutralization of Argument Delimiters in a Command)

## Which versions are affected by CVE-2026-20063?


## How do I fix CVE-2026-20063?

No fix has been published for CVE-2026-20063 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-20063 being exploited?

There is no known exploitation of CVE-2026-20063 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-20063 and fix it if it is affected.

What it is: CVE-2026-20063 is a medium-severity command injection vulnerability in Cisco Secure Firewall Threat Defense (FTD) Software, published on 4 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-20063 in the wild and no public exploit code.

Affected product: Cisco Secure Firewall Threat Defense (FTD) Software. 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-2026-20063/ (Markdown: https://insights.sbomify.com/CVE-2026-20063/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-20063
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-20063
- OSV: https://osv.dev/vulnerability/CVE-2026-20063

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-20063/
Summaries are generated and may contain mistakes; the official description above is the record.