CVE-2021-31556

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

1.62% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 74.4% of scored records. A rank, not a probability.

NVD base score

9.8 (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:H/A:H

NVD analysis status

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

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

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

2021-08-12 21:38Z5 YR AGO

Last updated

2024-08-03 23:03Z2 YR AGO

Reserved

2021-04-22

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-1284Improper Validation of Specified Quantity in InputBase
• CWE-20Improper Input ValidationClass

Data version

5.1

Document digest

eeeb8c7299594eaf4e48b62dbdd4de0d8453a11e3d11cb2979fc36bed1549827

• phabricator.wikimedia.orghttps://phabricator.wikimedia.org/T277380x_refsource_MISC
• gerrit.wikimedia.orghttps://gerrit.wikimedia.org/r/q/I13ff0350a9a0a3cd5ab3e1f82dd0d8d9c13cf9e9x_refsource_MISC
• lists.fedoraproject.orgFEDORA-2021-eee8b7514fhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QNEAI2T3Y65I55ZB6UE6RMC662RZTGRX/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2021-56d8173b5ehttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CJDYJQWT43GBD6GNQ4OW7JOZ6WQ6DZTN/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2021-3dd1b66cbfhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MDBPECBWN6LWNSWIQMVXK6PP4YFEUYHA/vendor-advisoryx_refsource_FEDORA