CVE-2021-30072: D-Link Dir-878 Firmware

Critical severity, CVSS 9.8. EPSS: 1.4% chance of exploitation in the next 30 days.

An issue was discovered in prog.cgi on D-Link DIR-878 1.30B08 devices. Because strcat is misused, there is a stack-based buffer overflow that does not require authentication.

Affected products

• D-Link Dir-878 Firmware: up to and including 1.30b08

Published 2021-04-02. Last modified 2026-06-17.