CVE-2021-40407

Exploitation

Exploited in the wild. Listed in the CISA Known Exploited Vulnerabilities catalog on 2024-12-18. Federal remediation due 2025-01-08.

SSVC decision

• ExploitationactiveCISA reports credible evidence of active exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

47.63% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 98.7% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

Analyzed. 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

2022-01-28 19:10Z4 YR AGO

Last updated

2025-10-21 23:15Z10 MO AGO

Reserved

2021-09-01

Assigning CNA

talos

Record state

PUBLISHED

Severity

Critical (CVSS 9.1)

CNA CVSS vector

CVSS:3.0/AV:N/AC:L/PR:H/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

4ee103c930a9706e2cb2ada659e9fcb9a92709e252038adbd9c929cbb03dfeba

• talosintelligence.comhttps://talosintelligence.com/vulnerability_reports/TALOS-2021-1424x_refsource_MISC
• www.cisa.govhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-40407government-resource