CVE-2021-25740

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

1.95% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 80.0% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

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

Red Hat severity

Low. 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

2021-09-20 17:05Z5 YR AGO

Last updated

2026-06-01 21:45Z5 MO AGO

Reserved

2021-01-21

Assigning CNA

kubernetes

Record state

PUBLISHED

Severity

Low (CVSS 3.1)

CNA CVSS vector

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

Weaknesses

• CWE-441Unintended Proxy or Intermediary ('Confused Deputy')Class
• CWE-610Externally Controlled Reference to a Resource in Another SphereClass
• CWE-863Incorrect AuthorizationClass

Data version

5.2

Document digest

2bf4dcd470644384c30764520652c70de3ff31a8b4dd3e6c470650c164019fe5

• kubernetes.iohttps://kubernetes.io/blog/2026/05/26/reconciling-unfixed-kubernetes-cves/x_refsource_MISC
• groups.google.comhttps://groups.google.com/g/kubernetes-security-announce/c/WYE9ptrhSLEx_refsource_MISC
• github.comhttps://github.com/kubernetes/kubernetes/issues/103675x_refsource_MISC
• security.netapp.comhttps://security.netapp.com/advisory/ntap-20211014-0001/x_refsource_CONFIRM