CVE-2006-5867: fetchmail before 6.3.6-rc4 does not properly enforce TLS and may transmit cleartext passwords over unsecure...

Security readout for executives and security teams

Older fetchmail versions could fail to enforce TLS, so mail account passwords might be sent over an unencrypted connection. An attacker positioned on the network path could capture credentials. This mainly matters for systems still running legacy fetchmail packages or inherited mail-collection scripts. Exposure is most likely on legacy systems that still run fetchmail before 6.3.6-rc4 or unverified distribution builds from the 2007 advisory period. Modern systems are likely unaffected if they use current vendor packages, but inherited cron jobs and old mail relays should be checked. Treat as a targeted legacy exposure issue. It is unlikely to be a broad emergency in current environments, but any affected system can leak reusable mail credentials. Prioritize verification where old servers, automation, or unsupported operating systems remain in production. Mitigation focus: Upgrade fetchmail to 6.3.6-rc4 or a vendor-patched later package.; Review referenced vendor advisories for distribution-specific package names and fixed versions.; Retire unused fetchmail jobs, especially legacy cron-based mail collection..

Prepared

Jun 29, 2026, 08:16 UTC (UTC+00:00)

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