# CVE-2026-2175: D-Link DIR-823X set_upnp sub_420618 os command injection

> Remote attackers can execute arbitrary OS commands on D-Link DIR-823X routers via the set_upnp interface.

- **Severity:** High 8.6 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/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:** 8 Feb 2026
- **Updated:** 23 Feb 2026
- **Also known as:** GHSA-g74q-8phg-6q8x

## What is CVE-2026-2175?

CVE-2026-2175 is a high-severity command injection vulnerability in D-Link DIR-823X, published on 8 Feb 2026. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

A weakness has been identified in D-Link DIR-823X 250416. This vulnerability affects the function sub_420618 of the file /goform/set_upnp. This manipulation of the argument upnp_enable causes os command injection. Remote exploitation of the attack is possible. The exploit has been made available to the public and could be used for attacks.

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-2026-2175?

It affects 1 product.


Products: Dlink Dir-823x Firmware.

## How do I fix CVE-2026-2175?

No fix has been published for CVE-2026-2175 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-2175 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-2175 exists.

## Other vulnerabilities in D-Link DIR-823X

- [CVE-2025-29635](https://insights.sbomify.com/CVE-2025-29635/): D-Link DIR-823X Command Injection (high 7.2, exploited in the wild)
- [CVE-2025-29040](https://insights.sbomify.com/CVE-2025-29040/): Command injection in n/a (critical 9.8)
- [CVE-2025-29041](https://insights.sbomify.com/CVE-2025-29041/): Command injection in n/a (critical 9.8)
- [CVE-2025-29042](https://insights.sbomify.com/CVE-2025-29042/): Command injection in n/a (critical 9.8)
- [CVE-2025-29043](https://insights.sbomify.com/CVE-2025-29043/): Command injection in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-2175 and fix it if it is affected.

What it is: CVE-2026-2175 is a high-severity command injection vulnerability in D-Link DIR-823X, published on 8 Feb 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-2026-2175 exists.

Affected product: D-Link DIR-823X. 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-2026-2175/ (Markdown: https://insights.sbomify.com/CVE-2026-2175/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-2175
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-2175
- OSV: https://osv.dev/vulnerability/CVE-2026-2175

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-2175/
Summaries are generated and may contain mistakes; the official description above is the record.