CVE-2019-4551: IBM Security Directory Server

Medium severity, CVSS 5.3. EPSS: 1.3% chance of exploitation in the next 30 days.

IBM Security Directory Server 6.4.0 does not perform an authentication check for a critical resource or functionality allowing anonymous users access to protected areas. IBM X-Force ID: 165953.

Affected products

• IBM Security Directory Server: from 6.4.0.0, before 6.4.0.20 (fixed in 6.4.0.20)

Published 2020-02-04. Last modified 2026-06-17.