CVE-2019-17621
D-Link DIR-859 router contains a command execution vulnerability in the UPnP endpoint URL, /gena.cgi. Exploitation allows an unauthenticated remote…
Browse: All 2019 CVEs · All vendors
- CVSS score
- 9.8 Critical
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H- CISA KEV
- Yes — actively exploited (added 2023-06-29, remediation due 2023-07-20)
- Weakness (CWE)
- CWE-78
- Published
- 2019-12-30
- Last modified
- 2026-06-17
- NVD status
- Analyzed
Description
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.
Affected products
- dlink dir-859 firmware
- dlink dir-822 firmware
- dlink dir-823 firmware
- dlink dir-865l firmware
- dlink dir-868l firmware
- dlink dir-869 firmware
- dlink dir-880l firmware
- dlink dir-890l firmware
- dlink dir-890r firmware
- dlink dir-885l firmware
- dlink dir-885r firmware
- dlink dir-895l firmware
Affected ranges per NVD CPE data; confirm exact versions in the vendor advisory.
Required action (CISA)
Apply updates per vendor instructions or discontinue use of the product if updates are unavailable. Federal remediation deadline: 2023-07-20.
How to prioritize this
This vulnerability is on the CISA KEV list, meaning it is being actively exploited — treat it as urgent regardless of the raw CVSS number. Use the live CVE lookup for the latest NVD data, and the CVSS 3.1 calculator to model your own environmental score. For the actively exploited vulnerabilities that matter this week, read The Exploit HQ daily security brief.
References
- http://packetstormsecurity.com/files/156054/D-Link-DIR-859-Unauthenticated-Remote-Command-Execution.html
- https://medium.com/%40s1kr10s/d-link-dir-859-rce-unautenticated-cve-2019-17621-en-d94b47a15104
- https://medium.com/%40s1kr10s/d-link-dir-859-rce-unautenticated-cve-2019-17621-es-fad716629ff9
- https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10146
- https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10147
- https://www.dlink.com/en/security-bulletin
- https://www.ftc.gov/system/files/documents/cases/dlink_proposed_order_and_judgment_7-2-19.pdf
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-17621
FAQ
Is CVE-2019-17621 actively exploited?
Yes. CISA added CVE-2019-17621 to its Known Exploited Vulnerabilities (KEV) catalog on 2023-06-29, with a federal remediation deadline of 2023-07-20. A KEV listing means real-world exploitation is confirmed, so patching this should be prioritized above many higher-CVSS bugs that aren't being exploited.
What is the CVSS score of CVE-2019-17621?
CVE-2019-17621 has a CVSS base score of 9.8 (Critical). Its vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Related vulnerabilities
- CVE-2024-0769 — D-Link DIR-859 Router
- CVE-2025-29635 — D-Link DIR-823X
- CVE-2022-37055 — D-Link Routers
- CVE-2020-25078 — D-Link DCS-2530L and DCS-2670L Devices
- CVE-2020-25079 — D-Link DCS-2530L and DCS-2670L Devices
- CVE-2022-40799 — D-Link DNR-322L
Data source: NVD & CISA KEV. Shown as-is; nothing added. Last generated from NVD data — re-check the live tool for updates.
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