CVE-2012-0726: The default configuration of TLS in IBM Tivoli Directory Server (TDS) 6.3 and earlier supports the (1) NULL...

Security readout for executives and security teams

IBM Tivoli Directory Server 6.3 and earlier can, by default, allow TLS sessions with no encryption. That means traffic expected to be protected could be sent in cleartext if NULL-MD5 or NULL-SHA is negotiated. This is primarily a confidentiality risk for directory data and credentials crossing affected TLS connections. Exposure is most likely where IBM Tivoli Directory Server 6.3 or earlier is still running with default TLS settings and reachable by remote clients. Internet-facing or broadly accessible directory services increase business risk. Treat this as a targeted legacy-platform cleanup item with confidentiality impact. It should be prioritized if affected directory services handle credentials, identity data, or are reachable outside tightly controlled networks. Mitigation focus: Identify IBM Tivoli Directory Server deployments at version 6.3 or earlier.; Review IBM APAR and advisory guidance for supported fixes or configuration changes.; Remove NULL-MD5 and NULL-SHA from allowed TLS cipher configurations where vendor-supported..

Prepared

Jun 24, 2026, 12:52 UTC (UTC+00:00)

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