Is CVE-2019-17621 actively exploited?

CVE-2019-17621 has no public evidence of in-the-wild exploitation as of 2025-11-07.

What is the CVSS score for CVE-2019-17621?

CVE-2019-17621 has a CVSS score of 9.8 (CRITICAL severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

How do I patch CVE-2019-17621?

Patch guidance is available from dlink security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2019-17621.

Fix CVE-2019-17621 - CRITICAL dlink dir-859 firmware

Q: Which products are affected by CVE-2019-17621?

21 products: dlink dir-859 firmware, dlink dir-859 firmware, dlink dir-822 firmware, dlink dir-822 firmware, dlink dir-823 firmware, and 16 more.

Description

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

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high
Weaknesses: CWE-78 · OS Command Injection CWE-78 · OS Command Injection

Metadata

Primary Vendor: DLINK
Published: 12/30/2019
Last Modified: 11/7/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

dlink : dir-859_firmwaredlink : dir-859_firmwaredlink : dir-822_firmwaredlink : dir-822_firmwaredlink : dir-823_firmwaredlink : dir-823_firmwaredlink : dir-865l_firmwaredlink : dir-868l_firmwaredlink : dir-868l_firmwaredlink : dir-869_firmwaredlink : dir-869_firmwaredlink : dir-880l_firmwaredlink : dir-890l_firmwaredlink : dir-890l_firmwaredlink : dir-890r_firmwaredlink : dir-890r_firmwaredlink : dir-885l_firmwaredlink : dir-885r_firmwaredlink : dir-895l_firmwaredlink : dir-895r_firmwaredlink : dir-818lx_firmware

Remediation Guidance

Executive Summary

View on NIST NVD