CVE-2019-17621

9.8 CRITICAL 91% exploit odds Drop everything exploited in the wild Fix listed Injection Network gear

What it is

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.

At a glance

Exploitability: Can be exploited over the network without logging in. High risk of data exposure, data tampering, service disruption.
In the wild: CISA lists this as exploited in real attacks. Treat as urgent.
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2019-10-16 00:00 UTC ReservedThe CVE id was reserved by its CNA
2019-12-30 17:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2023-06-29 Exploited in the wildAdded to CISA's Known Exploited Vulnerabilities list
2023-07-20 Remediation deadlineCISA's due date for federal agencies to fix it
2026-06-17 02:24 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: yes, CISA lists it. This puts it above everything that is not.
Exploit odds: 90.6% in the next 30 days (EPSS).
Severity: 9.8 CRITICAL (CVSS).
Fix: a patch or advisory is linked.
It meets the bar for Drop everything: critical, and exploited or very likely to be.

Details

Published: 2019-12-30 17:15 UTC
Last modified: 2026-06-17 02:24 UTC
Added to CISA KEV: 2023-06-29
Exploit probability: 90.6% · EPSS, next 30 days
Weakness: CWE-78 · OS command injection
Record status: Analyzed

Affected

Dlink dir-859 Firmware ≤ 1.05b03
Dlink dir-859 Firmware 1.06b01
Dlink dir-822 Firmware ≤ 2.03b01
Dlink dir-822 Firmware ≤ 3.12b04
Dlink dir-823 Firmware ≤ 1.00b06
Dlink dir-823 Firmware 1.00b06
Dlink dir-865l Firmware ≤ 1.07b01
Dlink dir-868l Firmware ≤ 1.12b04

Attack profile CVSS 3.1 · 9.8

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: High

Raw vector

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

Is it in your code?

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Fix and advisories

References

NVD record · CVE.org record