# CVE-2025-4340: D-Link DIR-890L/DIR-806A1 soap.cgi sub_175C8 command injection

> Remote attackers can execute arbitrary commands on unsupported D-Link DIR-890L and DIR-806A1 routers via a command injection flaw in soap.cgi.

- **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:** 6 May 2025
- **Updated:** 6 May 2025
- **Also known as:** GHSA-rh69-7g6g-53pr

## What is CVE-2025-4340?

CVE-2025-4340 is a medium-severity command injection vulnerability in D-Link DIR-806A1, published on 6 May 2025. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability classified as critical has been found in D-Link DIR-890L and DIR-806A1 up to 100CNb11/108B03. Affected is the function sub_175C8 of the file /htdocs/soap.cgi. The manipulation leads to command injection. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. This vulnerability only affects products that are no longer supported by the maintainer.

Weakness: CWE-77 (Improper Neutralization of Special Elements used in a Command), CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component)

## Which versions are affected by CVE-2025-4340?

It affects 2 products.


Products: Dlink Dir-806 Firmware, Dlink Dir-890l Firmware.

## How do I fix CVE-2025-4340?

No fix has been published for CVE-2025-4340 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-4340 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-4340 exists.

## Other vulnerabilities in D-Link DIR-806A1

- [CVE-2023-43129](https://insights.sbomify.com/CVE-2023-43129/): Command injection in n/a (critical 9.8)
- [CVE-2023-43130](https://insights.sbomify.com/CVE-2023-43130/): Command injection in n/a (critical 9.8)
- [CVE-2023-43128](https://insights.sbomify.com/CVE-2023-43128/): Command injection in n/a (critical 9.8)
- [CVE-2019-10891](https://insights.sbomify.com/CVE-2019-10891/): Command injection in n/a (critical 9.8)
- [CVE-2019-10892](https://insights.sbomify.com/CVE-2019-10892/): Memory corruption in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-4340 and fix it if it is affected.

What it is: CVE-2025-4340 is a medium-severity command injection vulnerability in D-Link DIR-806A1, published on 6 May 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-2025-4340 exists.

Affected product: D-Link DIR-806A1. 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-2025-4340/ (Markdown: https://insights.sbomify.com/CVE-2025-4340/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-4340
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-4340
- OSV: https://osv.dev/vulnerability/CVE-2025-4340

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-4340/
Summaries are generated and may contain mistakes; the official description above is the record.