---
cve: "CVE-2021-41028"
severity: "HIGH"
cvss: 8.2
epss: "21%"
vendor: "Fortinet"
kev: false
exploited: false
published: "2021-12-16 19:15:08"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-04T22:07:42+02:00"
---

# CVE-2021-41028

> 8.2 HIGH

## Beschreibung

A combination of a use of hard-coded cryptographic key vulnerability [CWE-321] in FortiClientEMS 7.0.1 and below, 6.4.6 and below and an improper certificate validation vulnerability [CWE-297] in FortiClientWindows, FortiClientLinux and FortiClientMac 7.0.1 and below, 6.4.6 and below may allow an unauthenticated and network adjacent attacker to perform a man-in-the-middle attack between the EMS and the FCT via the telemetry protocol.

## CVSS-Vektor

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

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

## Schwachstellen-Klasse

- **CWE-321** — Use of Hard-coded Cryptographic Key
  The product uses a hard-coded, unchangeable cryptographic key.
- **CWE-297** — Improper Validation of Certificate with Host Mismatch
  The product communicates with a host that provides a certificate, but the product does not properly ensure that the certificate is actually associated with that host.

## Referenzen

- <https://fortiguard.com/advisory/FG-IR-21-075>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2021-41028) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_