CVE-2004-1291: Buffer overflow in qwik-smtpd allows remote attackers to use the server as an SMTP spam relay via a long HE...

Security readout for executives and security teams

CVE-2004-1291 affects qwik-smtpd, an SMTP server component. A remote sender can use an overly long HELO greeting to corrupt server memory and make the server behave as a spam relay. The bundle does not identify affected versions, a vendor patch, or current exploitation. Exposure is limited to environments still running qwik-smtpd or the referenced qwilmail SMTP implementation, especially if reachable from the internet. The provided affected product metadata is incomplete, so confirm exposure through asset inventory rather than assuming broad applicability. Treat this as an exposure-confirmation item, not an emergency based on current evidence. Prioritize if legacy qwik-smtpd/qwilmail is internet-facing or relaying outbound mail, because spam relay abuse can damage sender reputation and mail deliverability. Mitigation focus: Identify any internet-facing qwik-smtpd or qwilmail SMTP services.; Check vendor or maintainer guidance for patched or replacement versions.; Restrict SMTP relay to authenticated users and trusted mail paths..

Prepared

Jun 30, 2026, 01:53 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.