What is CVE-2020-4662?

CVE-2020-4662 is a high-severity vulnerability in IBM Event Streams, classified under Improper Authentication. CVSS score: 8.8/10. Published 2020-08-14.

How severe is CVE-2020-4662?

High severity. CVSS v3 base score is 8.8 out of 10.

Auth bypass in IBM Event Streams

CVE-2020-4662

IBM Event Streams 10.0.0 could allow an authenticated user to perform tasks to a schema due to improper authentication validation. IBM X-Force ID: 186233.

Vulnerability class: Broken Authentication

Published 2020-08-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.013 (69.2th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 69th percentile — 69.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000

Affected products

IBM Event Streams — versions 10.0.0
IBM Event Streams — versions 10.0.0

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

www.ibm.com/support/pages/node/6259393 (Patch, Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/186233 (VDB Entry, vdb-entry, Vendor Advisory)

Frequently asked questions

What is CVE-2020-4662?: CVE-2020-4662 is a high-severity vulnerability in IBM Event Streams, classified under Improper Authentication. CVSS score: 8.8/10. Published 2020-08-14.
How severe is CVE-2020-4662?: High severity. CVSS v3 base score is 8.8 out of 10.