What is CVE-2021-20527?

CVE-2021-20527 is a high-severity vulnerability in IBM Resilient, classified under Command Injection. CVSS score: 7.2/10. Published 2021-04-19.

How severe is CVE-2021-20527?

High severity. CVSS v3 base score is 7.2 out of 10.

RCE in IBM Resilient

CVE-2021-20527

IBM Resilient SOAR V38.0 could allow a privileged user to create create malicious scripts that could be executed as another user. IBM X-Force ID: 198759.

Vulnerability class: Command Injection (OS Command Injection)

Published 2021-04-19 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.011 (63.6th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 63.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

IBM Resilient
IBM Resilient Onprem — versions 38.0

Weakness classification (CWE)

CWE-77 — Command Injection

References

www.ibm.com/support/pages/node/6444747 (Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/198759 (VDB Entry, vdb-entry, Vendor Advisory)

Frequently asked questions

What is CVE-2021-20527?: CVE-2021-20527 is a high-severity vulnerability in IBM Resilient, classified under Command Injection. CVSS score: 7.2/10. Published 2021-04-19.
How severe is CVE-2021-20527?: High severity. CVSS v3 base score is 7.2 out of 10.