CVE-2021-27114: D-Link Dir-816 Firmware

Critical severity, CVSS 9.8. EPSS: 24.6% chance of exploitation in the next 30 days.

An issue was discovered in D-Link DIR-816 A2 1.10 B05 devices. Within the handler function of the /goform/addassignment route, a very long text entry for the"'s_ip" and "s_mac" fields could lead to a Stack-Based Buffer Overflow and overwrite the return address.

Affected products

• D-Link Dir-816 Firmware: version 1.10b05 only

Published 2021-04-14. Last modified 2026-06-17.