What is CVE-2021-20500?

CVE-2021-20500 is a medium-severity vulnerability in Docker. CVSS score: 4.4/10. Published 2021-07-15.

How severe is CVE-2021-20500?

Medium severity. CVSS v3 base score is 4.4 out of 10.

Vulnerability in Docker

CVE-2021-20500

IBM Security Verify Access Docker 10.0.0 could reveal highly sensitive information to a local privileged user. IBM X-Force ID: 197980.

Published 2021-07-15 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.003 (14.8th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 15th percentile — 14.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Docker
IBM Security Verify Access — versions 10.0.0
IBM Security Verify Access Docker — versions 10.0.0

References

www.ibm.com/support/pages/node/6471895 (Patch, Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/197980 (VDB Entry, vdb-entry, Vendor Advisory)

Frequently asked questions

What is CVE-2021-20500?: CVE-2021-20500 is a medium-severity vulnerability in Docker. CVSS score: 4.4/10. Published 2021-07-15.
How severe is CVE-2021-20500?: Medium severity. CVSS v3 base score is 4.4 out of 10.