# CVE-2018-25120: D-Link DNS-343 ShareCenter <= 1.05 Command Injection via /goform/Mail_Test

> Unauthenticated remote attackers can execute arbitrary shell commands as root via the Mail Test endpoint on D-Link DNS-343 devices.

- **Severity:** Critical 9.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 29 Oct 2025
- **Updated:** 14 May 2026
- **Also known as:** GHSA-3r6w-f62x-hc2h

## What is CVE-2018-25120?

CVE-2018-25120 is a critical command injection vulnerability in D-Link DNS-343 ShareCenter, published on 29 Oct 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

D-Link DNS-343 ShareCenter devices running firmware versions up to and including 1.05 contain a command injection vulnerability in the Mail Test functionality. The web maintenance script posts to the internal goForm endpoint '/goform/Mail_Test' and uses several form parameters directly in a call to a system email utility without proper input validation. An unauthenticated remote attacker can supply crafted form data that injects shell commands, resulting in execution as root on the device. NOTE: The DNS-343 product line has been declared end-of-life.

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

## Which versions are affected by CVE-2018-25120?

It affects 1 product.


Products: Dlink Dns-343 Firmware.

## How do I fix CVE-2018-25120?

No fix has been published for CVE-2018-25120 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-25120 being exploited?

There is no known exploitation of CVE-2018-25120 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-25120 and fix it if it is affected.

What it is: CVE-2018-25120 is a critical command injection vulnerability in D-Link DNS-343 ShareCenter, published on 29 Oct 2025. 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-2018-25120 in the wild and no public exploit code.

Affected product: D-Link DNS-343 ShareCenter. 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-2018-25120/ (Markdown: https://insights.sbomify.com/CVE-2018-25120/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-25120
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-25120
- OSV: https://osv.dev/vulnerability/CVE-2018-25120

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-25120/
Summaries are generated and may contain mistakes; the official description above is the record.