# CVE-2021-34725: Cisco IOS XE SD-WAN Software Command Injection Vulnerability

> Authenticated administrative users can inject arbitrary commands to execute code with root privileges on Cisco IOS XE SD-WAN devices.

- **Severity:** Medium 6.7 (`CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H`)
- **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:** 23 Sep 2021
- **Updated:** 7 Nov 2024
- **Also known as:** GHSA-9mw5-w2j2-3f45

## What is CVE-2021-34725?

CVE-2021-34725 is a medium-severity command injection vulnerability in Cisco IOS XE SD-WAN Software, published on 23 Sep 2021. 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 IOS XE SD-WAN Software could allow an authenticated, local attacker to inject arbitrary commands to be executed with root-level privileges on the underlying operating system. This vulnerability is due to insufficient input validation on certain CLI commands. An attacker could exploit this vulnerability by authenticating to an affected device and submitting crafted input to the CLI. The attacker must be authenticated as an administrative user to execute the affected commands. A successful exploit could allow the attacker to execute commands with root-level privileges.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command), CWE-77 (Improper Neutralization of Special Elements used in a Command)

## Which versions are affected by CVE-2021-34725?

It affects 1 product.


Products: Cisco Ios Xe Sd-Wan.

## How do I fix CVE-2021-34725?

No fix has been published for CVE-2021-34725 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-34725 being exploited?

There is no known exploitation of CVE-2021-34725 in the wild and no public exploit code.

## Other vulnerabilities in Cisco IOS XE SD-WAN Software

- [CVE-2021-34727](https://insights.sbomify.com/CVE-2021-34727/): Cisco IOS XE SD-WAN Software Buffer Overflow Vulnerability (critical 9.8)
- [CVE-2020-3375](https://insights.sbomify.com/CVE-2020-3375/): Cisco SD-WAN Solution Software Buffer Overflow Vulnerability (critical 9.8)
- [CVE-2021-1305](https://insights.sbomify.com/CVE-2021-1305/): Cisco SD-WAN vManage Authorization Bypass Vulnerabilities (high 8.8)
- [CVE-2023-20035](https://insights.sbomify.com/CVE-2023-20035/): Cisco IOS XE SD-WAN Software Command Injection Vulnerability (high 7.8)
- [CVE-2020-3216](https://insights.sbomify.com/CVE-2020-3216/): Cisco IOS XE SD-WAN Software Authentication Bypass Vulnerability (medium 6.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-34725 and fix it if it is affected.

What it is: CVE-2021-34725 is a medium-severity command injection vulnerability in Cisco IOS XE SD-WAN Software, published on 23 Sep 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-2021-34725 in the wild and no public exploit code.

Affected product: Cisco IOS XE SD-WAN 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-2021-34725/ (Markdown: https://insights.sbomify.com/CVE-2021-34725/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-34725
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-34725
- OSV: https://osv.dev/vulnerability/CVE-2021-34725

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-34725/
Summaries are generated and may contain mistakes; the official description above is the record.