CVE-2021-40520

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

1.18% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 65.7% 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

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

2021-11-10 16:06Z4 YR AGO

Last updated

2024-08-04 02:44Z2 YR AGO

Reserved

2021-09-05

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-521Weak Password RequirementsBase

Data version

5.1

Document digest

51b8f5bf21ca86415e2634728458d50a6190c5e80fde6ce06b25c4ff68730584

• airangel.comhttps://airangel.com/hsmx-gateway/x_refsource_MISC
• etizazmohsin.comhttp://etizazmohsin.com/hsmx.html#sshx_refsource_MISC