CVE-2006-5973: Off-by-one buffer overflow in Dovecot 1.0test53 through 1.0.rc14, and possibly other versions, when index f...

Security readout for executives and security teams

This is an old Dovecot mail-server flaw that can let an authenticated IMAP or POP3 user crash the service. The business impact is mail availability, not confirmed data theft. Exposure depends on running affected pre-1.0 Dovecot builds with index files and mmap_disable set to yes. Likely exposure is limited to legacy Dovecot deployments, especially distribution packages from the 2006 era. Systems not running Dovecot, not offering IMAP/POP3 login, or not using the vulnerable configuration are not indicated as affected by the supplied sources. Treat this as a legacy mail-service availability risk. It is not a top-tier emergency unless old Dovecot systems remain in production, but any internet-facing affected server should be upgraded or retired promptly. Mitigation focus: Upgrade Dovecot using the applicable Dovecot or Linux distribution security advisory.; Prioritize systems running Dovecot 1.0test53 through 1.0.rc14.; Review mmap_disable settings and index-file usage against vendor guidance..

Prepared

Jun 29, 2026, 09:26 UTC (UTC+00:00)

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