# CVE-2021-26724: Authenticated command injection when changing date settings or hostname in Guardian/CMC before 20.0.7.4

> Authenticated administrators can execute arbitrary OS commands via the web GUI when modifying date or hostname settings in Nozomi Networks Guardian and CMC.

- **Severity:** High 8.6 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 22 Feb 2021
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-h84w-4wfq-6h9c

## What is CVE-2021-26724?

CVE-2021-26724 is a high-severity command injection vulnerability in Nozomi Networks CMC, published on 22 Feb 2021. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

OS Command Injection vulnerability when changing date settings or hostname using web GUI of Nozomi Networks Guardian and CMC allows authenticated administrators to perform remote code execution. This issue affects: Nozomi Networks Guardian 20.0.7.3 version 20.0.7.3 and prior versions. Nozomi Networks CMC 20.0.7.3 version 20.0.7.3 and prior versions.

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

## Which versions are affected by CVE-2021-26724?

It affects 2 products.


Products: Nozominetworks Central Management Control, Nozominetworks Guardian.

## How do I fix CVE-2021-26724?

No fix has been published for CVE-2021-26724 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-26724 being exploited?

There is no known exploitation of CVE-2021-26724 in the wild and no public exploit code.

## Other vulnerabilities in Nozomi Networks CMC

- [CVE-2021-26725](https://insights.sbomify.com/CVE-2021-26725/): Authenticated command path traversal on timezone settings in Guardian/CMC before 20.0.7.4 (high 8.6)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-26724 and fix it if it is affected.

What it is: CVE-2021-26724 is a high-severity command injection vulnerability in Nozomi Networks CMC, published on 22 Feb 2021. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-26724 in the wild and no public exploit code.

Affected product: Nozomi Networks CMC. 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-2021-26724/ (Markdown: https://insights.sbomify.com/CVE-2021-26724/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-26724
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-26724
- OSV: https://osv.dev/vulnerability/CVE-2021-26724

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-26724/
Summaries are generated and may contain mistakes; the official description above is the record.