# CVE-2025-1339: TOTOLINK X18 cstecgi.cgi setL2tpdConfig os command injection

> Remote attackers can execute arbitrary OS commands via the setL2tpdConfig function in TOTOLINK X18 routers, requiring authentication.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 16 Feb 2025
- **Updated:** 18 Feb 2025
- **Also known as:** GHSA-27g6-qpfh-w967

## What is CVE-2025-1339?

CVE-2025-1339 is a medium-severity command injection vulnerability in TOTOLINK X18, published on 16 Feb 2025. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability was found in TOTOLINK X18 9.1.0cu.2024_B20220329. It has been rated as critical. This issue affects the function setL2tpdConfig of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument enable leads to os command injection. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

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-2025-1339?

It affects 1 product.


Products: Totolink X18 Firmware.

## How do I fix CVE-2025-1339?

No fix has been published for CVE-2025-1339 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-1339 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-1339 exists.

## Other vulnerabilities in TOTOLINK X18

- [CVE-2025-29209](https://insights.sbomify.com/CVE-2025-29209/): Command injection in n/a (critical 9.8)
- [CVE-2025-29064](https://insights.sbomify.com/CVE-2025-29064/): Code injection in n/a (critical 9.8)
- [CVE-2023-29798](https://insights.sbomify.com/CVE-2023-29798/): Command injection in n/a (critical 9.8)
- [CVE-2023-29799](https://insights.sbomify.com/CVE-2023-29799/): Command injection in n/a (critical 9.8)
- [CVE-2023-29800](https://insights.sbomify.com/CVE-2023-29800/): Command injection in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-1339 and fix it if it is affected.

What it is: CVE-2025-1339 is a medium-severity command injection vulnerability in TOTOLINK X18, published on 16 Feb 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-1339 exists.

Affected product: TOTOLINK X18. 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-2025-1339/ (Markdown: https://insights.sbomify.com/CVE-2025-1339/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-1339
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-1339
- OSV: https://osv.dev/vulnerability/CVE-2025-1339

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-1339/
Summaries are generated and may contain mistakes; the official description above is the record.