---
cve: "CVE-2021-27104"
severity: "CRITICAL"
cvss: 9.8
epss: "56.7%"
vendor: "n/a"
kev: true
exploited: true
published: "2021-02-16 21:15:13"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-10-09T17:07:18+02:00"
---

# CVE-2021-27104

> 9.8 CRITICAL · ⚠️ CISA KEV (1801 Tage) · 🔓 Exploited · 🧪 PoC

## Beschreibung

Accellion FTA 9_12_370 and earlier is affected by OS command execution via a crafted POST request to various admin endpoints. The fixed version is FTA_9_12_380 and later.

## CISA-Anreicherung (vulnrichment/ADP)

- CISA KEV seit: **03.11.2021**
- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **active**
  - Automatable: **no**
  - Technical Impact: **total**

## CVSS-Vektor

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

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

## Referenzen

- <https://www.accellion.com/products/fta/>
- <https://github.com/accellion/CVEs/blob/main/CVE-2021-27104.txt>
- <https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-27104>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2021-27104/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_