# CVE-2021-26115: Command injection in FortiWAN

> A local authenticated attacker can escalate privileges to root on FortiWAN devices by exploiting a command injection vulnerability in the CLI.

- **Severity:** High 7.6 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:X/RC:C`)
- **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:** 19 Dec 2024
- **Updated:** 20 Dec 2024
- **Also known as:** GHSA-f6w7-3cg5-fhr8

## What is CVE-2021-26115?

CVE-2021-26115 is a high-severity command injection vulnerability in Fortinet FortiWAN, published on 19 Dec 2024. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

An OS command injection (CWE-78) vulnerability in FortiWAN version 4.5.7 and below Command Line Interface may allow a local, authenticated and unprivileged attacker to escalate their privileges to root via executing a specially-crafted command.An OS command injection (CWE-78) vulnerability in FortiWAN Command Line Interface may allow a local, authenticated and unprivileged attacker to escalate their privileges to root via executing a specially-crafted command.

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

## Which versions are affected by CVE-2021-26115?

It affects 1 product.


Products: Fortinet Fortiwan.

## How do I fix CVE-2021-26115?

No fix has been published for CVE-2021-26115 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-26115 being exploited?

There is no known exploitation of CVE-2021-26115 in the wild and no public exploit code.

## Other vulnerabilities in Fortinet FortiWAN

- [CVE-2021-26102](https://insights.sbomify.com/CVE-2021-26102/): Path traversal in FortiWAN (critical 9.8)
- [CVE-2021-26114](https://insights.sbomify.com/CVE-2021-26114/): SQL injection in Fortinet FortiWAN (critical 9.8)
- [CVE-2016-4965](https://insights.sbomify.com/CVE-2016-4965/): Command injection in n/a (high 8.8)
- [CVE-2023-44252](https://insights.sbomify.com/CVE-2023-44252/): Auth bypass in FortiWAN (high 8.6)
- [CVE-2023-44251](https://insights.sbomify.com/CVE-2023-44251/): Path traversal in FortiWAN (high 8.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-26115 and fix it if it is affected.

What it is: CVE-2021-26115 is a high-severity command injection vulnerability in Fortinet FortiWAN, published on 19 Dec 2024. 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-2021-26115 in the wild and no public exploit code.

Affected product: Fortinet FortiWAN. 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-2021-26115/ (Markdown: https://insights.sbomify.com/CVE-2021-26115/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-26115
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-26115
- OSV: https://osv.dev/vulnerability/CVE-2021-26115

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-26115/
Summaries are generated and may contain mistakes; the official description above is the record.