CVE-2019-6258: D-Link Dir-822 Firmware

Critical severity, CVSS 9.8. EPSS: 2.6% chance of exploitation in the next 30 days.

D-Link DIR-822 Rev.Bx devices with firmware v.202KRb06 and older allow a buffer overflow via long MacAddress data in a /HNAP1/SetClientInfo HNAP protocol message, which is mishandled in /usr/sbin/udhcpd during reading of the /var/servd/LAN-1-udhcpd.conf file.

Affected products

• D-Link Dir-822 Firmware: up to and including 2.02krb06

Published 2020-08-18. Last modified 2026-06-17.