CVE-2004-1098: MIMEDefang in MIME-tools 5.414 allows remote attackers to bypass virus scanning capabilities via an e-mail...

Security readout for executives and security teams

This flaw could let a specially malformed email attachment evade virus scanning in MIMEDefang when using MIME-tools 5.414. It does not describe direct system takeover, but it weakens a mail security control and could allow malicious mail to reach users if legacy filtering remains in place. Exposure is most likely on legacy mail gateways or filtering systems still using MIMEDefang with MIME-tools 5.414-era packages. Modern systems are less likely affected, but inherited mail infrastructure, old Linux distributions, or unsupported appliances should be checked. Prioritize this if the organization still operates legacy email filtering. For current, fully patched platforms, urgency is lower. The business concern is control bypass: infected mail may avoid gateway scanning and reach users. Mitigation focus: Apply relevant MIME-tools or distribution security updates from vendor advisories.; Replace unsupported legacy mail-filtering packages or appliances.; Check current vendor guidance for MIMEDefang and MIME-tools deployments..

Prepared

Jun 30, 2026, 02:08 UTC (UTC+00:00)

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