What is CVE-2019-4158?

CVE-2019-4158 is a medium-severity vulnerability in IBM Security Access Manager, classified under Missing Authorization. CVSS score: 5.4/10. Published 2019-06-25.

How severe is CVE-2019-4158?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Auth bypass in IBM Security Access Manager

CVE-2019-4158

IBM Security Access Manager 9.0.1 through 9.0.6 does not prove that a user's identity is correct which can lead to the exposure of resources or functionality to unintended actors. IBM X-Force ID: 158574.

Vulnerability class: Broken Access Control

Published 2019-06-25 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.007 (51.1th percentile), scored 2026-10-20.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 51.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: -0.000

Affected products

IBM Security Access Manager — versions 9.0.1, 9.0.3, 9.0.4
IBM Security Access Manager

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

www.ibm.com/support/docview.wss (Patch, Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/158574 (VDB Entry, vdb-entry, Vendor Advisory)

Frequently asked questions

What is CVE-2019-4158?: CVE-2019-4158 is a medium-severity vulnerability in IBM Security Access Manager, classified under Missing Authorization. CVSS score: 5.4/10. Published 2019-06-25.
How severe is CVE-2019-4158?: Medium severity. CVSS v3 base score is 5.4 out of 10.