CVE-2019-17621

D-Link DIR-859 Router Command Execution

9.8 CRITICALActively exploited (CISA KEV)Public exploitEPSS 89.6%

Published30 Dec 2019
Added to CISA KEV29 Jun 2023
Remediation due20 Jul 2023

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 3.1 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

D-Link Dir-818lx Firmwareall versions

D-Link Dir-822 Firmware≤ 2.03b01 · ≤ 3.12b04

D-Link Dir-823 Firmware≤ 1.00b06 · 1.00b06

D-Link Dir-859 Firmware≤ 1.05b03 · 1.06b01

D-Link Dir-865l Firmware≤ 1.07b01

D-Link Dir-868l Firmware≤ 1.12b04 · ≤ 2.05b02

D-Link Dir-869 Firmware≤ 1.03b02 · 1.03b02

D-Link Dir-880l Firmware≤ 1.08b04

D-Link Dir-885l Firmware≤ 1.12b05

D-Link Dir-885r Firmware≤ 1.12b05

D-Link Dir-890l Firmware≤ 1.11b01 · 1.11b01

D-Link Dir-890r Firmware≤ 1.11b01 · 1.11b01

D-Link Dir-895l Firmware≤ 1.12b10

D-Link Dir-895r Firmware≤ 1.12b10

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

Patch & vendor advisories

References

http://packetstormsecurity.com/files/156054/D-Link-DIR-859-Unauthenticated-Remote-Command-Execution.htmlExploitThird Party AdvisoryVDB Entry
https://medium.com/%40s1kr10s/d-link-dir-859-rce-unautenticated-cve-2019-17621-en-d94b47a15104ExploitThird Party Advisory
https://medium.com/%40s1kr10s/d-link-dir-859-rce-unautenticated-cve-2019-17621-es-fad716629ff9Broken Link
https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10146PatchVendor Advisory
https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10147PatchVendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-17621US Government Resource
https://www.dlink.com/en/security-bulletinVendor Advisory
https://www.ftc.gov/system/files/documents/cases/dlink_proposed_order_and_judgment_7-2-19.pdfThird Party AdvisoryUS Government Resource

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

Frequently asked

Is CVE-2019-17621 being actively exploited?

Yes. CVE-2019-17621 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 29 Jun 2023.

How severe is CVE-2019-17621?

CVE-2019-17621 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 89.6% probability of exploitation.

Which products are affected by CVE-2019-17621?

Affected products include D-Link Dir-818lx Firmware, D-Link Dir-822 Firmware, D-Link Dir-823 Firmware, D-Link Dir-859 Firmware, D-Link Dir-865l Firmware, and 9 more.

How do I fix CVE-2019-17621?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2019-17621 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, a risk for it never ranks below high, and the update that fixes it moves to the Emergency patch lane. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.