CVE-2000-1021

CVE-2000-1021 describes a heap overflow vulnerability in WebConfig within Alt-N MDaemon versions 3.1.1 and earlier. This flaw allows unauthenticated remote attackers to trigger a denial of service and potentially execute arbitrary code by supplying an excessively long URL. With a CVSS score of 7.5 (HIGH), this vulnerability is easily exploitable over the network with low attack complexity, potentially leading to partial compromise of confidentiality, integrity, and availability. While not actively exploited in the wild and not on the CISA KEV catalog, a denial-of-service exploit is publicly available on ExploitDB, though there is no evidence of broader community discussion or media coverage.