CVE-2019-20217: D-Link DIR-859 Firmware

Critical severity, CVSS 9.8. EPSS: 3.6% chance of exploitation in the next 30 days.

D-Link DIR-859 1.05 and 1.06B01 Beta01 devices allow remote attackers to execute arbitrary OS commands via the urn: to the M-SEARCH method in ssdpcgi() in /htdocs/cgibin, because SERVER_ID is mishandled. The value of the urn: service/device is checked with the strstr function, which allows an attacker to concatenate arbitrary commands separated by shell metacharacters.

Affected products

• D-Link DIR-859 Firmware: version 1.05 only; version 1.06b01 only

Published 2020-01-29. Last modified 2026-06-17.