CVE-2026-3978: D-Link Dir-513 Firmware

High severity, CVSS 8.8. EPSS: 1.2% chance of exploitation in the next 30 days.

A vulnerability was detected in D-Link DIR-513 1.10. The impacted element is an unknown function of the file /goform/formEasySetupWizard3. The manipulation of the argument wan_connected results in stack-based buffer overflow. The attack can be launched remotely. The exploit is now public and may be used.

Affected products

• D-Link Dir-513 Firmware: version 1.10 only

Published 2026-03-12. Last modified 2026-06-17.