CVE-2021-25740

3.1 LOW

Published: September 20, 2021 Modified: June 01, 2026

Description

A security issue was discovered with Kubernetes that could enable users to send network traffic to locations they would otherwise not have access to via a confused deputy attack.

AI Explanation

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

CVSS v3.x Details

0.0 Low Medium High Critical 10.0

Vector String

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

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory

https://github.com/kubernetes/kubernetes/issues/103675

Source: jordan@liggitt.net

Mitigation Third Party Advisory

https://groups.google.com/g/kubernetes-security-announce/c/WYE9ptrhSLE

Source: jordan@liggitt.net

Mailing List Mitigation Third Party Advisory

https://kubernetes.io/blog/2026/05/26/reconciling-unfixed-kubernetes-cves/

Source: jordan@liggitt.net

https://security.netapp.com/advisory/ntap-20211014-0001/

Source: jordan@liggitt.net

Third Party Advisory

https://github.com/kubernetes/kubernetes/issues/103675

Source: af854a3a-2127-422b-91ae-364da2661108

Mitigation Third Party Advisory

https://groups.google.com/g/kubernetes-security-announce/c/WYE9ptrhSLE

Source: af854a3a-2127-422b-91ae-364da2661108

Mailing List Mitigation Third Party Advisory

https://security.netapp.com/advisory/ntap-20211014-0001/

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party Advisory

7 reference(s) from NVD

Quick Stats

CVSS v3 Score

3.1 / 10.0

EPSS (Exploit Probability)

1.8%

76th percentile

Exploitation Status

Not in CISA KEV

Weaknesses (CWE)

CWE-441 CWE-610

Affected Vendors

kubernetes

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