---
id: "CVE-2019-17621"
kind: "vulnerability"
aliases: ["CVE-2019-17621"]
title: "The UPnP endpoint URL /gena.cgi in the D-Link DIR-859 Wi-Fi router 1.05 and 1.06B01 Beta01 allows an Unauthenticated\u2026"
severity: "critical"
cvss: 10.0
epss: null
exploited: true
status: "open"
category: "infrastructure"
products: [{"name": "D-Link DIR-859 Router", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "dlink dir-859 firmware", "fixed": [], "affected": "<= 1.05b03", "ecosystem": "vendor"}, {"name": "dlink dir-859 firmware", "fixed": [], "affected": "= 1.06b01", "ecosystem": "vendor"}, {"name": "dlink dir-822 firmware", "fixed": [], "affected": "<= 2.03b01", "ecosystem": "vendor"}, {"name": "dlink dir-822 firmware", "fixed": [], "affected": "<= 3.12b04", "ecosystem": "vendor"}, {"name": "dlink dir-823 firmware", "fixed": [], "affected": "<= 1.00b06", "ecosystem": "vendor"}, {"name": "dlink dir-823 firmware", "fixed": [], "affected": "= 1.00b06", "ecosystem": "vendor"}, {"name": "dlink dir-865l firmware", "fixed": [], "affected": "<= 1.07b01", "ecosystem": "vendor"}, {"name": "dlink dir-868l firmware", "fixed": [], "affected": "<= 1.12b04", "ecosystem": "vendor"}, {"name": "dlink dir-868l firmware", "fixed": [], "affected": "<= 2.05b02", "ecosystem": "vendor"}, {"name": "dlink dir-869 firmware", "fixed": [], "affected": "<= 1.03b02", "ecosystem": "vendor"}, {"name": "dlink dir-869 firmware", "fixed": [], "affected": "= 1.03b02", "ecosystem": "vendor"}, {"name": "dlink dir-880l firmware", "fixed": [], "affected": "<= 1.08b04", "ecosystem": "vendor"}, {"name": "dlink dir-890l firmware", "fixed": [], "affected": "<= 1.11b01", "ecosystem": "vendor"}, {"name": "dlink dir-890l firmware", "fixed": [], "affected": "= 1.11b01", "ecosystem": "vendor"}, {"name": "dlink dir-890r firmware", "fixed": [], "affected": "<= 1.11b01", "ecosystem": "vendor"}, {"name": "dlink dir-890r firmware", "fixed": [], "affected": "= 1.11b01", "ecosystem": "vendor"}, {"name": "dlink dir-885l firmware", "fixed": [], "affected": "<= 1.12b05", "ecosystem": "vendor"}, {"name": "dlink dir-885r firmware", "fixed": [], "affected": "<= 1.12b05", "ecosystem": "vendor"}, {"name": "dlink dir-895l firmware", "fixed": [], "affected": "<= 1.12b10", "ecosystem": "vendor"}, {"name": "dlink dir-895r firmware", "fixed": [], "affected": "<= 1.12b10", "ecosystem": "vendor"}, {"name": "dlink dir-818lx firmware", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["d-link", "dir-859", "exploited", "infrastructure", "routers", "self-hosted", "upnp"]
not_affected_if: ["no-dir-859-deployed", "upnp-disabled"]
published_at: "2019-12-30T17:15:19+00:00"
first_seen_at: "2026-10-23T19:11:51+00:00"
updated_at: "2026-10-23T22:29:04+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2019-17621", "first_seen_at": "2026-10-23T19:11:51+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-17621", "first_seen_at": "2026-10-23T22:29:04+00:00"}]
---

# The UPnP endpoint URL /gena.cgi in the D-Link DIR-859 Wi-Fi router 1.05 and 1.06B01 Beta01 allows an Unauthenticated…

D-Link DIR-859 routers have a command execution flaw in the UPnP service at /gena.cgi. An unauthenticated attacker on the local network can send a crafted HTTP SUBSCRIBE request and run system commands as root.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:D-Link DIR-859 Router affected ? fixed ?
- vendor:dlink dir-859 firmware affected <= 1.05b03 fixed ?
- vendor:dlink dir-859 firmware affected = 1.06b01 fixed ?
- vendor:dlink dir-822 firmware affected <= 2.03b01 fixed ?
- vendor:dlink dir-822 firmware affected <= 3.12b04 fixed ?
- vendor:dlink dir-823 firmware affected <= 1.00b06 fixed ?
- vendor:dlink dir-823 firmware affected = 1.00b06 fixed ?
- vendor:dlink dir-865l firmware affected <= 1.07b01 fixed ?
- vendor:dlink dir-868l firmware affected <= 1.12b04 fixed ?
- vendor:dlink dir-868l firmware affected <= 2.05b02 fixed ?
- vendor:dlink dir-869 firmware affected <= 1.03b02 fixed ?
- vendor:dlink dir-869 firmware affected = 1.03b02 fixed ?
- vendor:dlink dir-880l firmware affected <= 1.08b04 fixed ?
- vendor:dlink dir-890l firmware affected <= 1.11b01 fixed ?
- vendor:dlink dir-890l firmware affected = 1.11b01 fixed ?
- vendor:dlink dir-890r firmware affected <= 1.11b01 fixed ?
- vendor:dlink dir-890r firmware affected = 1.11b01 fixed ?
- vendor:dlink dir-885l firmware affected <= 1.12b05 fixed ?
- vendor:dlink dir-885r firmware affected <= 1.12b05 fixed ?
- vendor:dlink dir-895l firmware affected <= 1.12b10 fixed ?
- vendor:dlink dir-895r firmware affected <= 1.12b10 fixed ?
- vendor:dlink dir-818lx firmware affected ? fixed ?

## How to check

Identify any D-Link DIR-859 routers in use, including firmware version via the admin interface.
Check whether UPnP is enabled on the router.

## Fix

Apply the vendor firmware update per D-Link instructions, or stop using the DIR-859 if no update is available.
Disable UPnP as a mitigation until patched.

## Timeline

- 2026-10-23T19:11:51+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2019-17621
- 2026-10-23T22:29:04+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2019-17621

## From the sources

D-Link DIR-859 router contains a command execution vulnerability in the UPnP endpoint URL, /gena.cgi. Exploitation allows an unauthenticated remote attacker to execute system commands as root by sending a specially crafted HTTP SUBSCRIBE request to the UPnP service when connecting to the local network.

CISA required action: Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_