---
cve: "CVE-2021-34809"
severity: "CRITICAL"
cvss: 9.9
epss: "1.9%"
vendor: "Synology"
kev: false
exploited: false
published: "2021-06-18 03:15:06"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-10-01T12:07:32+02:00"
---

# CVE-2021-34809

> 9.9 CRITICAL

## Beschreibung

Improper neutralization of special elements used in a command ('Command Injection') vulnerability in task management component in Synology Download Station before 3.8.16-3566 allows remote authenticated users to execute arbitrary code via unspecified vectors.

## CVSS-Vektor

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

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

## Referenzen

- <https://www.synology.com/security/advisory/Synology_SA_21_11>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2021-34809) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_