---
cve: "CVE-2021-25740"
severity: "LOW"
cvss: 3.1
epss: "2%"
vendor: "Kubernetes"
kev: false
exploited: false
published: "2021-09-20 17:15:08"
tags: [cve, security, low]
source: tsecurity.de CVE-Dossier
exported: "2026-09-07T05:03:33+02:00"
---

# CVE-2021-25740

> 3.1 LOW · 🧪 PoC

## Beschreibung

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.

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Hoch | good |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Gering | warn |
| I Integrität | Keine | good |
| A Verfügbarkeit | Keine | good |

## Referenzen

- <https://kubernetes.io/blog/2026/05/26/reconciling-unfixed-kubernetes-cves/>
- <https://groups.google.com/g/kubernetes-security-announce/c/WYE9ptrhSLE>
- <https://github.com/kubernetes/kubernetes/issues/103675>
- <https://security.netapp.com/advisory/ntap-20211014-0001/>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2021-25740) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_