CVE-2026-90693: D-Link Dir-878

Critical severity, CVSS 9.9. EPSS: 0.9% chance of exploitation in the next 30 days.

A flaw has been found in D-Link DIR-878 120B05. This impacts the function SetWan3Settings of the component WAN Settings. This manipulation of the argument Primary/Secondary causes stack-based buffer overflow. Remote exploitation of the attack is possible.

Affected products

• D-Link Dir-878: version 120B05 only

Published 2026-09-14. Last modified 2026-09-15.