CVE-2021-20464

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

1.38% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 70.0% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

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

2022-04-22 16:30Z4 YR AGO

Last updated

2024-09-16 20:32Z1 YR AGO

Reserved

2020-12-17

Assigning CNA

ibm

Record state

PUBLISHED

Severity

Medium (CVSS 6.5)

CNA CVSS vector

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

Weaknesses

• CWE-776Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')Base

Data version

5.1

Document digest

6ad6c604caa5413d2affe0ef1d89b124e55562f345e5a0cc4437691a9d2f6d3c

• www.ibm.comhttps://www.ibm.com/support/pages/node/6570957x_refsource_CONFIRM
• exchange.xforce.ibmcloud.comibm-cognos-cve202120464-dos (196813)https://exchange.xforce.ibmcloud.com/vulnerabilities/196813vdb-entryx_refsource_XF
• security.netapp.comhttps://security.netapp.com/advisory/ntap-20220602-0003/x_refsource_CONFIRM