D-Link · DIR-859 Router
CVE-2019-17621
D-Link DIR-859 Router Command Execution Vulnerability
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.
CISA: 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.
What to do
Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.
Deadline for US federal agencies: July 20, 2023
- Added to the CISA list
- June 29, 2023
- Published
- December 30, 2019
- Severity
- Critical 9.8 CVSS 3.1
- Chance of attacks in the next 30 days (EPSS)
- 91% in the top 0.2% of all known vulnerabilities
- Weakness
- CWE-78
- More details
- NVD · CVE.org · CISA
All references (7)
- https://www.ftc.gov/system/files/documents/cases/dlink_proposed_order_and_judgment_7-2-19.pdf
- https://www.dlink.com/en/security-bulletin
- https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10147
- https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10146
- 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
- http://packetstormsecurity.com/files/156054/D-Link-DIR-859-Unauthenticated-Remote-Command-Execution.html
More exploited flaws from D-Link
| Added | Vulnerability | Product | Severity | Attack chance |
|---|---|---|---|---|
| Jun 25, 2025 | D-Link DIR-859 Router Path Traversal | DIR-859 Router | Medium 5.3 | 83% |
| Apr 24, 2026 | Command Injection | DIR-823X | High 7.2 | 88% |
| Dec 8, 2025 | Buffer Overflow | Routers | Critical 9.8 | 56% |
| Aug 5, 2025 | Unspecified | DCS-2530L and DCS-2670L Devices | High 7.5 | 98% |
| Aug 5, 2025 | DCS-2530L and DCS-2670L Command Injection | DCS-2530L and DCS-2670L Devices | High 8.8 | 54% |
| Aug 5, 2025 | Download of Code Without Integrity Check | DNR-322L | High 8.8 | 34% |
| Sep 30, 2024 | OS Command Injection | DIR-820 Router | Critical 9.8 | 98% |
| May 16, 2024 | Information Disclosure | DIR-605 Router | High 7.5 | 87% |
Sources: Known Exploited Vulnerabilities (CISA, public domain), CVE records (cve.org) and EPSS (FIRST). The chance of attacks is the EPSS estimate that someone will try to exploit the flaw in the next 30 days.