CVE-2021-21883

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

6.06% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 93.2% of scored records. A rank, not a probability.

NVD base score

9.9 (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:C/C:H/I:H/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

2021-12-22 18:06Z4 YR AGO

Last updated

2024-08-03 18:23Z2 YR AGO

Reserved

2021-01-04

Assigning CNA

talos

Record state

PUBLISHED

Severity

Critical (CVSS 9.9)

CNA CVSS vector

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Weaknesses

• CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')Base

Data version

5.1

Document digest

56ffca2c2acb1e3e41e4cee4b136f06d7a5118e95a9e4ee5708336ae5d69eaec

• talosintelligence.comhttps://talosintelligence.com/vulnerability_reports/TALOS-2021-1327x_refsource_MISC