# CVE-2018-5767: Command injection in n/a

> Remote unauthenticated attackers can execute arbitrary code on Tenda AC15 routers via a crafted password parameter in the COOKIE header.

- **Severity:** Critical 9.8 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 15 Feb 2018
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-ppmp-j437-m6h6

## What is CVE-2018-5767?

CVE-2018-5767 is a critical command injection vulnerability in n/a, published on 15 Feb 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An issue was discovered on Tenda AC15 V15.03.1.16_multi devices. A remote, unauthenticated attacker can gain remote code execution on the device with a crafted password parameter for the COOKIE header.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2018-5767?

It affects 1 product.


Products: Tendacn Ac15 Firmware.

## How do I fix CVE-2018-5767?

No fix has been published for CVE-2018-5767 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-5767 being exploited?

There is no known exploitation of CVE-2018-5767 in the wild and no public exploit code.

Public exploit code:

- Tenda AC15 Router - Remote Code Execution (exploitdb)
- An implementation of a proof-of-concept for CVE-2018-5767 (https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-5767) (github_poc): https://github.com/db44k/CVE-2018-5767-AC9
- An implementation of a proof-of-concept for CVE-2018-5767 (github_poc): https://github.com/Scorpion-Security-Labs/CVE-2018-5767-AC9

## Other vulnerabilities in n/a

- [CVE-2022-40853](https://insights.sbomify.com/CVE-2022-40853/): Memory corruption in n/a (critical 9.8)
- [CVE-2022-40860](https://insights.sbomify.com/CVE-2022-40860/): Memory corruption in n/a (critical 9.8)
- [CVE-2022-40862](https://insights.sbomify.com/CVE-2022-40862/): Memory corruption in n/a (critical 9.8)
- [CVE-2022-40864](https://insights.sbomify.com/CVE-2022-40864/): Memory corruption in n/a (critical 9.8)
- [CVE-2022-40865](https://insights.sbomify.com/CVE-2022-40865/): Memory corruption in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-5767 and fix it if it is affected.

What it is: CVE-2018-5767 is a critical command injection vulnerability in n/a, published on 15 Feb 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2018-5767 in the wild and no public exploit code.

Affected product: n/a. 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-2018-5767/ (Markdown: https://insights.sbomify.com/CVE-2018-5767/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-5767
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-5767
- OSV: https://osv.dev/vulnerability/CVE-2018-5767

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-5767/
Summaries are generated and may contain mistakes; the official description above is the record.