A stack-based buffer overflow vulnerability (CVE-2026-10206) was discovered in D-Link DI-8400 devices up to firmware version 16.07.26A1. The vulnerability affects an unknown function in the /dbsrv.asp file and can be exploited remotely by manipulating the 'str' argument. The exploit has been made public and is available for use, making this a high-priority security concern for organizations using affected D-Link devices. The vulnerability allows remote attackers to potentially execute arbitrary code or cause denial of service through stack-based buffer overflow attacks.