CVE-2006-1516: The check_connection function in sql_parse.cc in MySQL 4.0.x up to 4.0.26, 4.1.x up to 4.1.18, and 5.0.x up...

Security readout for executives and security teams

This flaw affects very old MySQL server branches. A remote attacker could send a malformed username during connection handling and cause MySQL to read beyond the intended buffer, potentially exposing fragments of server memory. The source bundle does not show active exploitation or a CVSS score. Exposure is most likely in legacy systems still running MySQL 4.0, 4.1, or early 5.0, especially where the database listener is reachable from untrusted networks. Modern supported MySQL installations are unlikely to be affected, but inherited appliances or embedded stacks should be checked. Treat this as a legacy exposure issue. It is not flagged as actively exploited in the supplied data, but any internet-reachable affected MySQL server should be remediated promptly because database memory disclosure can expose sensitive operational data. Mitigation focus: Inventory MySQL server versions across production, staging, appliances, and legacy hosts.; Upgrade affected MySQL branches according to MySQL or OS vendor security guidance.; Restrict MySQL listener exposure to trusted application hosts and administration networks..

Prepared

Jun 29, 2026, 12:56 UTC (UTC+00:00)

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