{"id":"CVE-2019-17621","published":"2019-12-30T17:15:19Z","modified":"2026-06-17T02:24:17Z","title":"D-Link DIR-859 Router Command Execution Vulnerability","vendor":"D-Link","product":"DIR-859 Router","tier":"core","eol":null,"description":{"text":"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.","provenance":"source","from":"NVD"},"summary":{"text":"The D-Link DIR-859 Wi-Fi router, in its UPnP service, contains an OS command injection flaw in the /gena.cgi endpoint. An unauthenticated remote attacker who can reach the router's local network can send a specially crafted HTTP SUBSCRIBE request to that UPnP service and execute system commands as root, without authentication or user interaction.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-30T13:36:08Z"},"cvss":{"score":9.8,"severity":"CRITICAL","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","provenance":"source","from":"NVD"},"epss":{"score":0.90615,"percentile":0.99802,"date":"2026-10-29","provenance":"source"},"kev":{"dateAdded":"2023-06-29","dueDate":"2023-07-20","ransomware":false,"requiredAction":"Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.","notes":"https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10147; https://nvd.nist.gov/vuln/detail/CVE-2019-17621","provenance":"source"},"vulncheckKev":{"dateAdded":"2023-06-22","exploitedFirstSeen":"2023-06-22","ransomware":false,"evidence":[{"url":"https://unit42.paloaltonetworks.com/mirai-variant-targets-iot-exploits/","date":"2023-06-22"},{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2023-06-29"},{"url":"https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2024-09-08&host_type=src&vulnerability=cve-2019-17621","date":"2024-09-08"},{"url":"https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2024-09-10&host_type=src&vulnerability=cve-2019-17621","date":"2024-09-10"},{"url":"https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2024-09-14&host_type=src&vulnerability=cve-2019-17621","date":"2024-09-14"},{"url":"https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2024-09-18&host_type=src&vulnerability=cve-2019-17621","date":"2024-09-18"},{"url":"https://media.defense.gov/2024/Sep/18/2003547016/-1/-1/0/CSA-PRC-LINKED-ACTORS-BOTNET.PDF","date":"2024-09-18"},{"url":"https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2024-09-29&host_type=src&vulnerability=cve-2019-17621","date":"2024-09-29"},{"url":"https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2025-07-19&host_type=src&vulnerability=cve-2019-17621","date":"2025-07-19"},{"url":"https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2025-07-23&host_type=src&vulnerability=cve-2019-17621","date":"2025-07-23"}],"evidenceTotal":83,"provenance":"source"},"exploited":true,"otx":{"pulseCount":50,"pulses":[{"name":"Actively_Exploited_Kev | Oct 29, 2026","url":"https://otx.alienvault.com/pulse/6ae20c1db17e7057ae7d9ad1","created":"2026-10-28"},{"name":"Actively_Exploited_Kev | Oct 28, 2026","url":"https://otx.alienvault.com/pulse/6ae0ba7e0e2a97ff7b218819","created":"2026-10-27"},{"name":"Actively_Exploited_Kev | Oct 27, 2026","url":"https://otx.alienvault.com/pulse/6adf68b85c3e852f3c111d18","created":"2026-10-26"},{"name":"Actively_Exploited_Kev | Oct 24, 2026","url":"https://otx.alienvault.com/pulse/6adb740e397c3ad4799aa4cd","created":"2026-10-23"},{"name":"Actively_Exploited_Kev | Oct 23, 2026","url":"https://otx.alienvault.com/pulse/6ada236fcfba2dfa730ea482","created":"2026-10-22"},{"name":"Actively_Exploited_Kev | Oct 22, 2026","url":"https://otx.alienvault.com/pulse/6ad8d33a077cbb5cab524d80","created":"2026-10-21"},{"name":"Actively_Exploited_Kev | Oct 21, 2026","url":"https://otx.alienvault.com/pulse/6ad78130c4d1ac2be83a8b6d","created":"2026-10-20"},{"name":"Actively_Exploited_Kev | Oct 20, 2026","url":"https://otx.alienvault.com/pulse/6ad62f63c24a405a3423cc13","created":"2026-10-19"},{"name":"Actively_Exploited_Kev | Oct 19, 2026","url":"https://otx.alienvault.com/pulse/6ad4dda174e5797d0bd238b7","created":"2026-10-18"},{"name":"Actively_Exploited_Kev | Oct 18, 2026","url":"https://otx.alienvault.com/pulse/6ad38c22e1848f8189d1c121","created":"2026-10-17"}],"provenance":"machine"},"cwes":[{"id":"CWE-78","name":"Improper Neutralization of Special Elements used in an OS Command"}],"references":[{"url":"http://packetstormsecurity.com/files/156054/D-Link-DIR-859-Unauthenticated-Remote-Command-Execution.html","tags":["Exploit","Third Party Advisory","VDB Entry"]},{"url":"https://medium.com/%40s1kr10s/d-link-dir-859-rce-unautenticated-cve-2019-17621-en-d94b47a15104","tags":["Exploit","Third Party Advisory"]},{"url":"https://medium.com/%40s1kr10s/d-link-dir-859-rce-unautenticated-cve-2019-17621-es-fad716629ff9","tags":["Broken Link"]},{"url":"https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10146","tags":["Patch","Vendor Advisory"]},{"url":"https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10147","tags":["Patch","Vendor Advisory"]},{"url":"https://www.dlink.com/en/security-bulletin","tags":["Vendor Advisory"]},{"url":"https://www.ftc.gov/system/files/documents/cases/dlink_proposed_order_and_judgment_7-2-19.pdf","tags":["Third Party Advisory","US Government Resource"]},{"url":"http://packetstormsecurity.com/files/156054/D-Link-DIR-859-Unauthenticated-Remote-Command-Execution.html","tags":["Exploit","Third Party Advisory","VDB Entry"]},{"url":"https://medium.com/%40s1kr10s/d-link-dir-859-rce-unautenticated-cve-2019-17621-en-d94b47a15104","tags":["Exploit","Third Party Advisory"]},{"url":"https://medium.com/%40s1kr10s/d-link-dir-859-rce-unautenticated-cve-2019-17621-es-fad716629ff9","tags":["Broken Link"]},{"url":"https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10146","tags":["Patch","Vendor Advisory"]},{"url":"https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10147","tags":["Patch","Vendor Advisory"]},{"url":"https://www.dlink.com/en/security-bulletin","tags":["Vendor Advisory"]},{"url":"https://www.ftc.gov/system/files/documents/cases/dlink_proposed_order_and_judgment_7-2-19.pdf","tags":["Third Party Advisory","US Government Resource"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-17621","tags":["US Government Resource"]}],"techniques":[{"id":"T1190","name":"Exploit Public-Facing Application","tactics":["initial-access"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: Unauthenticated remote exploit of network-facing UPnP endpoint","mappingType":"exploitation_technique","evidence":[{"from":"description","quote":"allows an Unauthenticated remote attacker to execute system commands","start":91,"end":159}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"},{"id":"T1059","name":"Command and Scripting Interpreter","tactics":["execution"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: Command execution as root on device","mappingType":"primary_impact","evidence":[{"from":"description","quote":"execute system commands as root","start":136,"end":167}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2019-7939","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2019-7939","exploited":true,"exploitedSince":"2023-06-29","provenance":"source"},"exploits":[],"exploitSources":{"pocGithub":{"count":1,"skipped":0,"earliest":"2022-07-20","earliestUrl":"https://github.com/Squirre17/CVE-2019-17621","repos":[{"name":"Squirre17/CVE-2019-17621","url":"https://github.com/Squirre17/CVE-2019-17621","stars":3,"created":"2022-07-20"}]},"metasploit":[{"name":"D-Link DIR-859 Unauthenticated Remote Command Execution","module":"exploit/linux/upnp/dlink_dir859_subscribe_exec","type":"exploit","disclosureDate":"2019-12-24","url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/upnp/dlink_dir859_subscribe_exec.rb"}],"first":{"date":"2019-12-24","source":"Metasploit","url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/upnp/dlink_dir859_subscribe_exec.rb"},"provenance":"source"},"exploitRefs":["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"],"flow":[{"stage":"exploitation","techniques":["T1190"],"provenance":"ai"},{"stage":"primary","techniques":["T1059"],"provenance":"ai"}],"timeline":[{"date":"2019-12-24","kind":"exploit-public","label":"First public exploit: Metasploit; later: PoC-in-GitHub 2022-07-20","url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/upnp/dlink_dir859_subscribe_exec.rb","provenance":"source"},{"date":"2019-12-30","kind":"published","label":"Published (NVD)","url":"https://nvd.nist.gov/vuln/detail/CVE-2019-17621","provenance":"source"},{"date":"2023-06-22","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV evidence)","url":"https://unit42.paloaltonetworks.com/mirai-variant-targets-iot-exploits/","provenance":"source"},{"date":"2023-06-29","kind":"kev","label":"Added to CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","provenance":"source"},{"date":"2023-06-29","kind":"euvd-exploited","label":"ENISA EUVD: exploited","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2019-7939","provenance":"source"}],"speed":{"daysToPublicExploit":null,"firstExploitFrom":"Metasploit","daysToKev":1277},"priority":{"score":69.8,"factors":[{"name":"In a KEV catalog","points":35.0,"detail":"listed in CISA KEV and VulnCheck KEV"},{"name":"Recent KEV listing","points":0.0,"detail":"added 1226 days ago"},{"name":"Known ransomware use","points":0.0,"detail":"not known"},{"name":"EPSS percentile","points":19.96,"detail":"percentile 0.9980"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":5.0,"detail":"2 NVD references tagged Exploit; 1 PoC-in-GitHub repo; 1 Metasploit module"},{"name":"Mentioned in OTX pulses","points":3.0,"detail":"50 pulses"},{"name":"CVSS severity","points":6.86,"detail":"base score 9.8"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]}}