What is CVE-2023-43021?

CVE-2023-43021 is a medium-severity vulnerability in IBM Aix, classified under Generation of Error Message Containing Sensitive Information. CVSS score: 5.3/10. Published 2023-12-01.

How severe is CVE-2023-43021?

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

Information disclosure in IBM Aix

CVE-2023-43021

IBM InfoSphere Information Server 11.7 could allow a remote attacker to obtain sensitive information when a detailed technical error message is returned in the browser. This information could be used in further attacks against the system. IBM X-Force ID: 266167.

Published 2023-12-01 · 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: 0.007 (51.9th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 51.9% 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 Aix
IBM Infosphere Information Server — versions 11.7
IBM Infosphere Information Server
Linux Kernel
Microsoft Windows

Weakness classification (CWE)

CWE-209 — Generation of Error Message Containing Sensitive Information

References

www.ibm.com/support/pages/node/7074317 (vendor-advisory, Patch, Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/266167 (VDB Entry, vdb-entry, Vendor Advisory)

Frequently asked questions

What is CVE-2023-43021?: CVE-2023-43021 is a medium-severity vulnerability in IBM Aix, classified under Generation of Error Message Containing Sensitive Information. CVSS score: 5.3/10. Published 2023-12-01.
How severe is CVE-2023-43021?: Medium severity. CVSS v3 base score is 5.3 out of 10.