A stack-based buffer overflow vulnerability affects multiple D-Link NAS devices including DNS and DNR series models up to version 20260205. The vulnerability exists in the cgi_addgroup_get_group_quota_minsize function of /cgi-bin/account_mgr.cgi file. Remote attackers can exploit this by manipulating the Name argument parameter. The exploit has been publicly disclosed and could be actively used by attackers. This affects over 20 different D-Link NAS device models across various series.