How severe is CVE-2019-4550?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in IBM Security Directory Server

CVE-2019-4550

IBM Security Directory Server 6.4.0 is deployed with active debugging code that can create unintended entry points. IBM X-Force ID: 165952.

Published 2020-02-04 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.011 (64.3th percentile), scored 2026-10-20.

Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 64.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

IBM Security Directory Server — versions 6.4.0
IBM Security Directory Server

References

www.ibm.com/support/pages/node/1288660 (Patch, Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/165952 (VDB Entry, vdb-entry)

Frequently asked questions

What is CVE-2019-4550?: CVE-2019-4550 is a medium-severity vulnerability in IBM Security Directory Server. CVSS score: 5.3/10. Published 2020-02-04.
How severe is CVE-2019-4550?: Medium severity. CVSS v3 base score is 5.3 out of 10.