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 exe…

published 2019-12-30 6y ago modified 2026-06-17 4mo ago also EUVD-2019-7939

cvss: 9.8; version 3.1, CNA
cisa kev: Exploited; added 2023-06-29
epss: 90.6%; EPSS 90.6% chance of exploitation in 30 days, percentile 99.8%
public exploits: 1; Metasploit

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.

Patch / fix

cisa required action Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.

links 2

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Timeline

2019-12-24 First public exploit (Metasploit exploit/linux/upnp/dlink_dir859_subscribe_exec)
2019-12-30 Published
2023-06-29 Added to CISA KEV
2023-07-20 CISA patch deadline
2025-02-04 CISA SSVC: exploitation active

Known exploited

Added: 3y ago (2023-06-29)
Patch by: 2023-07-20 (3y ago)
Ransomware: Not known
Required action: Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.
Vendor, product: D-Link, DIR-859 Router
CISA name: D-Link DIR-859 Router Command Execution Vulnerability

CISA SSVC

Exploitation: Active, exploited in the wild
Automatable: yes
Technical impact: total
Assessed: last yr. (2025-02-04)

Exploit prediction

90.62% chance of exploitation in the next 30 days, higher than 99.8% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

Metasploit exploit/linux/upnp/dlink_dir859_subscribe_exec D-Link DIR-859 Unauthenticated Remote Command Execution metasploit exploit, excellent rank, 2019-12-24
medium.com https://medium.com/%40s1kr10s/d-link-dir-859-rce-unautenticated-cve-2019-17621-en-d94b47a15104 referenced PoC, tagged "exploit" by a source, unverified
packetstormsecurity.com http://packetstormsecurity.com/files/156054/D-Link-DIR-859-Unauthenticated-Remote-Command-Execution.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	10.0	AV:N/AC:L/Au:N/C:C/I:C/A:C

Classification

Weakness

CWE-78 Improper Neutralization of Special Elements used in an OS Command

References

supportannouncement.us.dlink.com /announcement/publication.aspx?name=SAP10147
patch, vendor-advisory
supportannouncement.us.dlink.com /announcement/publication.aspx?name=SAP10146
patch, vendor-advisory
medium.com /%40s1kr10s/d-link-dir-859-rce-unautenticated-cve-2019-17621-en-d94b47a15104
exploit, third-party-advisory
packetstormsecurity.com /files/156054/D-Link-DIR-859-Unauthenticated-Remote-Command-Execution.html
exploit, third-party-advisory, vdb-entry
dlink.com /en/security-bulletin
vendor-advisory
ftc.gov /system/files/documents/cases/dlink_proposed_order_and_judgment_7-2-19.pdf
third-party-advisory, us-government-resource
medium.com /%40s1kr10s/d-link-dir-859-rce-unautenticated-cve-2019-17621-es-fad716629ff9
broken-link
cisa.gov /known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-17621
government-resource, us-government-resource

Sources

CVE List CVE-2019-17621
NVD CVE-2019-17621

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