What is CVE-2020-4591?

CVE-2020-4591 is a low-severity vulnerability in IBM Aix, classified under Missing Encryption of Sensitive Data. CVSS score: 3.3/10. Published 2020-08-28.

How severe is CVE-2020-4591?

Low severity. CVSS v3 base score is 3.3 out of 10.

Vulnerability in IBM Aix

CVE-2020-4591

IBM Spectrum Protect Server 8.1.0.000 through 8.1.10.000 could disclose sensitive information in nondefault settings due to occasionally not encrypting the second chunk of an object in an encrypted container pool. IBM X-Force ID: 184746.

Published 2020-08-28 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.002 (10.0th percentile), scored 2026-11-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 10th percentile — 10.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

IBM Aix
IBM Spectrum Protect Server — versions 8.1.0.000, 8.1.10.000
IBM Spectrum Protect Server
Linux Kernel
Microsoft Windows

Weakness classification (CWE)

CWE-311 — Missing Encryption of Sensitive Data

References

www.ibm.com/support/pages/node/6323765 (Patch, Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/184746 (VDB Entry, vdb-entry, Vendor Advisory)

Frequently asked questions

What is CVE-2020-4591?: CVE-2020-4591 is a low-severity vulnerability in IBM Aix, classified under Missing Encryption of Sensitive Data. CVSS score: 3.3/10. Published 2020-08-28.
How severe is CVE-2020-4591?: Low severity. CVSS v3 base score is 3.3 out of 10.