CVE-2006-5313: Hastymail 1.5 and earlier before 20061008 allows remote authenticated users to send arbitrary SMTP commands...

Security readout for executives and security teams

CVE-2006-5313 affects Hastymail 1.5 and earlier before the 20061008 release. An authenticated webmail user could make Hastymail pass unintended SMTP commands to the mail server. Business risk is highest where webmail access is allowed but direct SMTP access is intentionally restricted. Exposure is likely limited to organizations still running Hastymail 1.5 or earlier, especially releases before 20061008. Internet-facing webmail increases reach, but the issue still requires a valid authenticated Hastymail user. Treat this as a targeted legacy-webmail risk, not a broad emergency. Prioritize quickly if Hastymail is internet-facing, still used for production mail, or bridges users into a more trusted SMTP environment. Mitigation focus: Inventory any Hastymail deployments and confirm exact release dates and versions.; Upgrade Hastymail to the 20061008 release or later where applicable.; Review vendor security guidance before relying on compensating controls..

Prepared

Jun 29, 2026, 09:52 UTC (UTC+00:00)

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