# CVE-2026-85222: D-Link DNS-340L Add-On Center addon_center.cgi os command injection

> Remote attackers can execute arbitrary OS commands on D-Link DNS-340L devices via the Add-On Center CGI script.

- **Severity:** Critical 9.4 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 3 Sep 2026
- **Updated:** 4 Sep 2026
- **Also known as:** GHSA-wxm7-78m8-pmch

## What is CVE-2026-85222?

CVE-2026-85222 is a critical command injection vulnerability in D-Link DNS-340L, published on 3 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

A vulnerability has been found in D-Link DNS-340L 1.01B04. Affected by this vulnerability is an unknown functionality of the file /cgi-bin/addon_center.cgi of the component Add-On Center. Such manipulation of the argument f_name/f_url/f_flag/f_login_user leads to os command injection. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.

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-2026-85222?


## How do I fix CVE-2026-85222?

No fix has been published for CVE-2026-85222 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-85222 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-85222 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-85222 and fix it if it is affected.

What it is: CVE-2026-85222 is a critical command injection vulnerability in D-Link DNS-340L, published on 3 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-85222 exists.

Affected product: D-Link DNS-340L. 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-2026-85222/ (Markdown: https://insights.sbomify.com/CVE-2026-85222/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-85222
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-85222
- OSV: https://osv.dev/vulnerability/CVE-2026-85222

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-85222/
Summaries are generated and may contain mistakes; the official description above is the record.