Fortinet FortiOS, FortiProxy und FortiSwitch: Schwachstelle ermöglicht Manipulation von Dateien
WID-SEC-2026-1096 · first 15.04.2026 · updated 19.10.2026 · CVSS 6,0
What it is about
FortiOS ist ein gehärtetes Betriebssystem für FortiGate Plattformen. FortiProxy ist eine Web-Proxy Lösung. FortiSwitch bezeichnet die Ethernet Switch Produktfamilie von Fortinet. Ein lokaler Angreifer kann eine Schwachstelle in Fortinet FortiOS, Fortinet FortiProxy und Fortinet FortiSwitch ausnutzen, um Dateien zu manipulieren.
Under what conditions?
Only with access to the device or an account on it. Often the second step after a phishing email.
What can happen in the worst case
An attacker could use the vulnerability to
- Dateien zu manipulieren
Am I affected?
Affected according to the BSI:
- Fortinet FortiOS <7.6.5
- Fortinet FortiOS <7.4.10
- Fortinet FortiProxy <7.4.12
- Fortinet FortiProxy <7.6.5
- Fortinet FortiSwitch Manager <7.2.8
- Fortinet FortiSwitch Manager <7.0.7
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- Fortinet FortiOS 7.6.5
- Fortinet FortiOS 7.4.10
- Fortinet FortiProxy 7.4.12
- Fortinet FortiProxy 7.6.5
- Fortinet FortiSwitch Manager 7.2.8
- Fortinet FortiSwitch Manager 7.0.7
Is the vulnerability already being exploited?
- CVE-2025-61624: exploited in the wild according to CISA, in the catalogue since 16.10.2026.
Information and sources
- Original BSI advisory (WID)
- FortiGuard Labs PSIRT Advisory FG-IR-26-122 vom 2026-04-14 www.fortiguard.com
- CISA Known Exploited Vulnerabilities Catalog vom 2026-10-18 www.cisa.gov
CVE: CVE-2025-61624
Source: BSI warning and information service (CERT-Bund); CISA. The assessment of the conditions is my reading of the BSI text; the external pages are in their original language.