CVE-2021-25740 LOW

CVE-2021-25740: Holes in EndpointSlice Validation Enable Host Network Hijack

Vendor Kubernetes

Product Kubernetes

Weakness CWE-441

Published September 20, 2021

Last update June 1, 2026

View on NVD All CVEs

CVSS base score

3.1/10

Attack vector Network

Attack complexity High

Privileges required Low

User interaction None

Confidentiality Low

Integrity None

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

September 20, 2021 CVE published

June 1, 2026 Record updated

External resources

03References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2021-25740 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/441.html