How severe is CVE-2021-20566?

CVE-2021-20566 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-20566 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-20566?

CVE-2021-20566 affects Ibm Resilient Security Orchestration Automation And Response. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-20566?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-20566 published?

CVE-2021-20566 was published on 2021-06-16 and last updated on 2026-06-17.

CVE-2021-20566

CVE-2021-20566 is a high-severity vulnerability in Ibm Resilient Security Orchestration Automation And Response with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-327.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-327
Affected product: Ibm Resilient Security Orchestration Automation And Response
Published: 2021-06-16
Last modified: 2026-06-17

Description

IBM Resilient SOAR V38.0 uses weaker than expected cryptographic algorithms that could allow an attacker to decrypt highly sensitive information. IBM X-Force ID: 199238.

Frequently asked questions

What is CVE-2021-20566?: IBM Resilient SOAR V38.0 uses weaker than expected cryptographic algorithms that could allow an attacker to decrypt highly sensitive information. IBM X-Force ID: 199238.
How severe is CVE-2021-20566?: CVE-2021-20566 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-20566 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-20566?: CVE-2021-20566 affects Ibm Resilient Security Orchestration Automation And Response. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-20566?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-20566 published?: CVE-2021-20566 was published on 2021-06-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:ibm:resilient_security_orchestration_automation_and_response:38.0:*:*:*:*:*:*:*

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