What is CVE-2021-20420?

CVE-2021-20420 is a medium-severity vulnerability in IBM Security Guardium. CVSS score: 4.3/10. Published 2021-08-11.

How severe is CVE-2021-20420?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in IBM Security Guardium

CVE-2021-20420

IBM Security Guardium 11.2 could disclose sensitive information due to reliance on untrusted inputs that could aid in further attacks against the system. IBM X-Force ID: 196281.

Published 2021-08-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.007 (52.5th percentile), scored 2026-10-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 52.5% 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 Guardium — versions 11.2
IBM Security Guardium — versions 11.2
Linux Kernel

References

www.ibm.com/support/pages/node/6479901 (Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/196281 (VDB Entry, vdb-entry, Vendor Advisory)

Frequently asked questions

What is CVE-2021-20420?: CVE-2021-20420 is a medium-severity vulnerability in IBM Security Guardium. CVSS score: 4.3/10. Published 2021-08-11.
How severe is CVE-2021-20420?: Medium severity. CVSS v3 base score is 4.3 out of 10.