# CVE-2021-1421: Cisco Enterprise NFV Infrastructure Software Command Injection Vulnerability

> Authenticated local attackers can inject commands to execute arbitrary code with root privileges on Cisco NFVIS devices.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 6 May 2021
- **Updated:** 8 Nov 2024
- **Also known as:** GHSA-cw65-w4qp-2r37

## What is CVE-2021-1421?

CVE-2021-1421 is a high-severity command injection vulnerability in Cisco Enterprise NFV Infrastructure Software, published on 6 May 2021. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A vulnerability in Cisco Enterprise NFV Infrastructure Software (NFVIS) could allow an authenticated, local attacker to perform a command injection attack on an affected device. The vulnerability is due to insufficient validation of user-supplied input to a configuration command. An attacker could exploit this vulnerability by including malicious input during the execution of this command. A successful exploit could allow a non-privileged attacker authenticated in the restricted CLI to execute arbitrary commands on the underlying operating system (OS) with root privileges.

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

## Which versions are affected by CVE-2021-1421?

It affects 1 product.


Products: Cisco Enterprise Nfv Infrastructure Software.

## How do I fix CVE-2021-1421?

No fix has been published for CVE-2021-1421 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-1421 being exploited?

There is no known exploitation of CVE-2021-1421 in the wild and no public exploit code.

## Other vulnerabilities in Cisco Enterprise NFV Infrastructure Software

- [CVE-2022-20777](https://insights.sbomify.com/CVE-2022-20777/): Cisco Enterprise NFV Infrastructure Software Vulnerabilities (critical 9.9)
- [CVE-2022-20779](https://insights.sbomify.com/CVE-2022-20779/): Cisco Enterprise NFV Infrastructure Software Vulnerabilities (critical 9.9)
- [CVE-2022-20780](https://insights.sbomify.com/CVE-2022-20780/): Cisco Enterprise NFV Infrastructure Software Vulnerabilities (critical 9.9)
- [CVE-2021-34746](https://insights.sbomify.com/CVE-2021-34746/): Cisco Enterprise NFV Infrastructure Software Authentication Bypass Vulnerability (critical 9.8)
- [CVE-2020-3470](https://insights.sbomify.com/CVE-2020-3470/): Cisco Integrated Management Controller Multiple Remote Code Execution Vulnerabilities (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-1421 and fix it if it is affected.

What it is: CVE-2021-1421 is a high-severity command injection vulnerability in Cisco Enterprise NFV Infrastructure Software, published on 6 May 2021. 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-2021-1421 in the wild and no public exploit code.

Affected product: Cisco Enterprise NFV Infrastructure 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-2021-1421/ (Markdown: https://insights.sbomify.com/CVE-2021-1421/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-1421
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-1421
- OSV: https://osv.dev/vulnerability/CVE-2021-1421

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-1421/
Summaries are generated and may contain mistakes; the official description above is the record.