CVE-2021-40284: D-Link DSL-3782 Firmware

Medium severity, CVSS 6.5. EPSS: 2.6% chance of exploitation in the next 30 days.

D-Link DSL-3782 EU v1.01:EU v1.03 is affected by a buffer overflow which can cause a denial of service. This vulnerability exists in the web interface "/cgi-bin/New_GUI/Igmp.asp". Authenticated remote attackers can trigger this vulnerability by sending a long string in parameter 'igmpsnoopEnable' via an HTTP request.

Affected products

• D-Link DSL-3782 Firmware: version eu_1.01 only; version eu_1.03 only

Published 2021-09-09. Last modified 2026-06-17.