CVE-2021-20566

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

0.71% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 50.9% of scored records. A rank, not a probability.

NVD base score

7.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2021-06-16 16:15Z5 YR AGO

Last updated

2024-09-16 16:33Z1 YR AGO

Reserved

2020-12-17

Assigning CNA

ibm

Record state

PUBLISHED

Severity

Medium (CVSS 5.9)

CNA CVSS vector

CVSS:3.0/A:N/S:U/AC:H/I:N/PR:N/UI:N/AV:N/C:H/RL:O/RC:C/E:U

Weaknesses

• CWE-327Use of a Broken or Risky Cryptographic AlgorithmClass

Data version

5.1

Document digest

a2c31692062136b85e42060dbc34bdd29fd02ce9de674d76cb3d8a17f272c225

• www.ibm.comhttps://www.ibm.com/support/pages/node/6464043x_refsource_CONFIRM
• exchange.xforce.ibmcloud.comibm-resilient-cve202120566-info-disc (199238)https://exchange.xforce.ibmcloud.com/vulnerabilities/199238vdb-entryx_refsource_XF