No exploitation reportedFix available

CVE-2021-20527

Q: Is CVE-2021-20527 actively exploited?

Active exploitation of CVE-2021-20527 has not been confirmed. Its EPSS score was 1.1% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2021-20527?

CVE-2021-20527 has a CVSS v3 base score of 7.2 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

No exploitation reported by the sources we read.

Published2021-04-19
Fixed in40.1.51 · 40.0.6556 · 39.2.21 · 39.1.46 · 39.0.6536 · 38.2.41
WeaknessCWE-77

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC

2021-04-1917:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-20527?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-20527?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Ibm resilient

Branch	Affected	Fixed in	Source
40.1	≥ 40.1.50, < 40.1.51	40.1.51	NVD
40.0	≥ 40.0.6554, < 40.0.6556	40.0.6556	NVD
39.2	≥ 39.2.17, < 39.2.21	39.2.21	NVD
39.1	≥ 39.1, < 39.1.46	39.1.46	NVD
39.0	≥ 39.0, < 39.0.6536	39.0.6536	NVD
38.2	< 38.2.41	38.2.41	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Ibm resilient to 40.1.51 · 40.0.6556 · 39.2.21 · 39.1.46 · 39.0.6536 · 38.2.41

Advisories and patches

exchange.xforce.ibmcloud.comVendor Advisory
www.ibm.comVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.17.2read 2026-10-23
CNACVSS 3.06read 2026-10-23
NVDCVSS 2.06.5read 2026-10-23
NVDweakness (CWE)CWE-77read 2026-10-23
FIRST EPSSEPSS score1.1 %2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Published: 2021-04-19
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is 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.

Is CVE-2021-20527 actively exploited?

Active exploitation of CVE-2021-20527 has not been confirmed. Its EPSS score was 1.1% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-20527?

CVE-2021-20527 has a CVSS v3 base score of 7.2 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

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